Difference between revisions of "Colorado County Creation Dates and Parent Counties"

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{{Note|See an interactive outline map of [http://historical-county.newberry.org/website/Colorado/viewer.htm ''Colorado Historical Counties''] at Newberry Library site<ref>[http://historical-county.newberry.org/website/Colorado/viewer.htm ''Colorado Atlas of Historical County Boundaries'', John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.</ref> (Free) Enter a year, '''Refresh Map''', select '''zoom in''', then click on the map to enlarge it.}}
 +
 
 +
<br>
 +
{{Tip|Sort the table by '''Date Formed''' or by '''Parent Counties''' and check [http://historical-county.newberry.org/website/Colorado/documents/CO_County_Index.htm Boundary Changes] for interesting insights.}}
 +
{| border="1" width="100%" class="sortable"
 
|-
 
|-
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Name of County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Date Formed'''  
 +
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" |'''Boundary<br>Changes'''
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
 
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Parent County'''  
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Progeny County'''
+
| align="center" style="background: rgb(240, 240, 240) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;" | '''Counties Created by Boundary Changes'''
 
|-
 
|-
| Adams
+
| [[Alamosa County, Colorado|Alamosa]]
| 15 Apr 1861
+
| 1913  Mar 08
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#ALAMOSA Details]
 +
| Costilla, Conejos
 
| none
 
| none
 
|-
 
|-
| Alamosa
+
| [[Arapahoe County, Colorado|Arapahoe]]
| 08 Mar 1913
+
| 1861  Nov 01
| Costilla, Conejos
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#ARAPAHOE Details]
 +
| Colorado Territory
 +
| Denver 1901, Washington 1887, Yuma 1889
 +
|-
 +
| [[Archuleta County, Colorado|Archuleta]]
 +
| 1885  Apr 14
 +
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#ARCHULETA Details]
 +
| Conejos  
 
| none
 
| none
 
|-
 
|-
| Arapahoe
+
| [[Baca County, Colorado|Baca]]
| 01 Nov 1861
+
| 1889 Apr 16
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#BACA Details]
| Denver 1901, Washington 1887, Yuma 1889
+
| Los Animas
|-
 
| Archuleta
 
| 14 Apr 1885
 
| Conejos
 
 
| none
 
| none
 
|-
 
|-
| Baca
+
| [[Boulder County, Colorado|Boulder]]
| 16 Apr 1889
+
| 1861  Nov 01
| Los Animas
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#BOULDER Details]
 +
| Colorado Territory
 
| none
 
| none
 
|-
 
|-
| Boulder
+
| [[Broomfield County, Colorado|City and County of Broomfield]]
| 01 Nov 1861
+
| 2001  Nov 15
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#BROOMFIELD Details]
 +
| nowrap="nowrap" | Adams, Boulder, Jefferson, Weld
 
| none
 
| none
 
|-
 
|-
| Carbonate
+
| Carbonate  
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm# Details]
 +
| Colorado Territory  
 
| renamed Lake 1879
 
| renamed Lake 1879
 
|-
 
|-
| Chaffee
+
| [[Chaffee County, Colorado|Chaffee]]
| 10 Feb 1879
+
| 1879  Feb 10  
| Lake
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CHAFFEE Details]
 +
| Lake  
 
| none
 
| none
 
|-
 
|-
| Cheyenne
+
| [[Cheyenne County, Colorado|Cheyenne]]
| 25 Mar 1889
+
| 1889  Mar 25  
| Bent, Elbert
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CHEYENNE Details]
 +
| Bent, Elbert  
 
| Kiowa 1889
 
| Kiowa 1889
 
|-
 
|-
| Clear Creek
+
| [[Clear Creek County, Colorado|Clear Creek]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CLEAR%20CREEK Details]
 +
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Conejos
+
| [[Conejos County, Colorado|Conejos]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CONEJOS Details]
 +
| Colorado Territory  
 
| Alamosa 1913, Archuleta 1885, Hinsdale 1874, La Plata 1874, Rio Grande 1874
 
| Alamosa 1913, Archuleta 1885, Hinsdale 1874, La Plata 1874, Rio Grande 1874
 
|-
 
|-
| Costilla
+
| [[Costilla County, Colorado|Costilla]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#COSTILLA Details]
 +
| Colorado Territory  
 
| Alamosa 1913, Rio Grande 1874, Saguache 1866
 
| Alamosa 1913, Rio Grande 1874, Saguache 1866
 
|-
 
|-
| Crowley
+
| [[Crowley County, Colorado|Crowley]]
| nowrap="nowrap" | 29 May 1911<br>
+
| <br> rap no
| Bent, Otero
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CROWLEY Details]
 +
| Bent, Otero  
 
| none
 
| none
 
|-
 
|-
| Custer
+
| [[Custer County, Colorado|Custer]]
| 09 Mar 1877
+
| 1877  Mar 09  
| Fremont
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CUSTER Details]
 +
| Fremont  
 
| none
 
| none
 
|-
 
|-
| Delta
+
| [[Delta County, Colorado|Delta]]
| 11 Feb 1883
+
| 1883  Feb 11  
| Gunnison
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#DELTA Details]
 +
| Gunnison  
 
| none
 
| none
 
|-
 
|-
| Denver
+
| [[Denver County, Colorado|City and County of Denver]]
| 18 Mar 1901
+
| 1901  Mar 18  
| Arapahoe
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#DENVER Details]
 +
| Arapahoe  
 
| none
 
| none
 
|-
 
|-
| Dolores
+
| [[Dolores County, Colorado|Dolores]]
| 19 Feb 1881
+
| 1881  Feb 19  
| Ouray
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#DOLORES Details]
 +
| Ouray  
 
| none
 
| none
 
|-
 
|-
| Douglas
+
| [[Douglas County, Colorado|Douglas]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#DOUGLAS Details]
 +
| Colorado Territory  
 
| Elbert 1874
 
| Elbert 1874
 
|-
 
|-
| Eagle
+
| [[Eagle County, Colorado|Eagle]]
| 11 Feb 1883
+
| 1883  Feb 11  
| Summit
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#EAGLE Details]
 +
| Summit  
 
| none
 
| none
 
|-
 
|-
| Elbert
+
| [[Elbert County, Colorado|Elbert]]
| 02 Feb 1874
+
| 1874  Feb 02  
| Douglas
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#ELBERT Details]
 +
| Douglas  
 
| Kit Carson 1889, Lincoln 1889
 
| Kit Carson 1889, Lincoln 1889
 
|-
 
|-
| El Paso
+
| [[El Paso County, Colorado|El Paso]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#El%20 PASO Details]
 +
| Colorado Territory  
 
| Teller 1899
 
| Teller 1899
 
|-
 
|-
| Fremont
+
| [[Fremont County, Colorado|Fremont]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#FREMONT Details]
 +
| Colorado Territory  
 
| Custer 1877
 
| Custer 1877
 
|-
 
|-
| Garfield
+
| [[Garfield County, Colorado|Garfield]]
| 10 Feb 1883
+
| 1883  Feb 10  
| Summit
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#GARFIELD Details]
 +
| Summit  
 
| none
 
| none
 
|-
 
|-
| Gilpin
+
| [[Gilpin County, Colorado|Gilpin]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#GILPIN Details]
 +
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Guadalupe
+
| Guadalupe  
| 01 Nov 1861
+
| 1861 Nov 01
| Colorado Territory
+
| Colorado Territory [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#CONEJOS Details]
 
| renamed Conejos 1861
 
| renamed Conejos 1861
 +
| none
 
|-
 
|-
| Gunnison
+
| [[Gunnison County, Colorado|Gunnison]]
| 09 Mar 1877
+
| 1877  Mar 09  
| Lake
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#GUNNISON Details]
 +
| Lake  
 
| Delta 1883, Mesa 1883, Montrose 1883, Pitkin 1881
 
| Delta 1883, Mesa 1883, Montrose 1883, Pitkin 1881
 
|-
 
|-
| Hinsdale
+
| [[Hinsdale County, Colorado|Hinsdale]]
| 10 Feb 1874
+
| 1874  Feb 10  
| Conejos
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#HINSDALE Details]
 +
| Conejos  
 
| Mineral 1893, Ouray 1877, Uncompahgre 1877
 
| Mineral 1893, Ouray 1877, Uncompahgre 1877
 
|-
 
|-
| Huerfano
+
| [[Huerfano County, Colorado|Huerfano]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#HUERFANO Details]
 +
| Colorado Territory  
 
| Los Animas 1866
 
| Los Animas 1866
 
|-
 
|-
| Jackson
+
| [[Jackson County, Colorado|Jackson]]
| 05 May 1909<br>
+
| <br> May 05
| Grand, Larimer
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#JACKSON Details]
 +
| Grand, Larimer  
 
| none
 
| none
 
|-
 
|-
| Jefferson
+
| [[Jefferson County, Colorado|Jefferson]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#JEFFERSON Details]
 +
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Kiowa
+
| [[Kiowa County, Colorado|Kiowa]]
| 11 Apr 1889
+
| 1889  Apr 11  
| Cheyenne, Bent
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#KIOWA Details]
 +
| Cheyenne, Bent  
 
| none
 
| none
 
|-
 
|-
| Kit Carson
+
| [[Kit Carson County, Colorado|Kit Carson]]
| 11 Apr 1889
+
| 1889  Apr 11  
| Elbert
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#KIT%20CARSON Details]
 +
| Elbert  
 
| none
 
| none
 
|-
 
|-
| Lake
+
| [[Lake County, Colorado|Lake]]
| 10 Feb 1879
+
| 1879  Feb 10  
| renamed from Carbonate
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LAKE Details]
 +
| renamed from Carbonate  
 
| Chaffee 1879, Gunnison 1877
 
| Chaffee 1879, Gunnison 1877
 
|-
 
|-
| La Plata
+
| [[La Plata County, Colorado|La Plata]]
| 10 Feb 1874
+
| 1874  Feb 10  
| Conejos, Lake
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LA%20PLATA Details]
 +
| Conejos, Lake  
 
| Montezuma 1889, San Juan 1876
 
| Montezuma 1889, San Juan 1876
 
|-
 
|-
| Larimer
+
| [[Larimer County, Colorado|Larimer]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LARIMER Details]
 +
| Colorado Territory  
 
| Jackson 1909
 
| Jackson 1909
 
|-
 
|-
| Los Animas
+
| [[Las Animas County, Colorado|Las Animas]]
| 09 Nov 1866
+
| 1866  Nov 09  
| Huerfano
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LAS%20ANIMAS Details]
 +
| Huerfano  
 
| Baca 1889
 
| Baca 1889
 
|-
 
|-
| Lincoln
+
| [[Lincoln County, Colorado|Lincoln]]
| 11 Apr 1889
+
| 1889  Apr 11  
| Elbert
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LINCOLN Details]
 +
| Elbert  
 
| none
 
| none
 
|-
 
|-
| Logan
+
| [[Logan County, Colorado|Logan]]
| 02 Feb 1887
+
| 1887  Feb 02  
| Weld
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#LOGAN Details]
 +
| Weld  
 
| Phillips 1889, Sedgwick 1889
 
| Phillips 1889, Sedgwick 1889
 
|-
 
|-
| Mesa
+
| [[Mesa County, Colorado|Mesa]]
| 14 Feb 1883
+
| 1883  Feb 14  
| Gunnison
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MESA Details]
 +
| Gunnison  
 
| none
 
| none
 
|-
 
|-
| Mineral
+
| [[Mineral County, Colorado|Mineral]]
| 27 Mar 1893
+
| 1893  Mar 27  
| Hinsdale
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MINERAL Details]
 +
| Hinsdale  
 
| none
 
| none
 
|-
 
|-
| Moffatt
+
| [[Moffat County, Colorado|Moffat]]
| 27 Feb 1911
+
| 1911  Feb 27  
| Routt
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MOFFAT Details]
 +
| Routt  
 
| none
 
| none
 
|-
 
|-
| Montezuma
+
| [[Montezuma County, Colorado|Montezuma]]
| 16 Apr 1889
+
| 1889  Apr 16  
| La Plata
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MONTEZUMA Details]
 +
| La Plata  
 
| none
 
| none
 
|-
 
|-
| Montrose
+
| [[Montrose County, Colorado|Montrose]]
| 11 Feb 1883
+
| 1883  Feb 11  
| Gunnison
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MONTROSE Details]
 +
| Gunnison  
 
| none
 
| none
 
|-
 
|-
| Morgan
+
| [[Morgan County, Colorado|Morgan]]
| 19 Feb1 889
+
| 889  Feb 19  
| Weld
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#MORGAN Details]
 +
| Weld  
 
| none
 
| none
 
|-
 
|-
| Otero
+
| [[Otero County, Colorado|Otero]]
| 19 Feb 1889
+
| 1889  Feb 19  
| Bent
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#OTERO Details]
 +
| Bent  
 
| Crowley 1911
 
| Crowley 1911
 
|-
 
|-
| Ouray
+
| [[Ouray County, Colorado|Ouray]]
| 02 Mar 1883
+
| 1883  Mar 02  
| nowrap="nowrap" | renamed from Uncompahgre
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#OURAY Details]
 +
| nowrap="nowrap" | renamed from Uncompahgre  
 
| Dolores 1881, San Miguel 1861
 
| Dolores 1881, San Miguel 1861
 
|-
 
|-
| Park
+
| [[Park County, Colorado|Park]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#PARK Details]
 +
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Phillips
+
| [[Phillips County, Colorado|Phillips]]
| 27 Mar 1889
+
| 1889  Mar 27  
| Logan
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#PHILLIPS Details]
 +
| Logan  
 
| none
 
| none
 
|-
 
|-
| Pitkin
+
| [[Pitkin County, Colorado|Pitkin]]
| 23 Feb 1881
+
| 1881  Feb 23  
| Gunnison
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#PITKIN Details]
 +
| Gunnison  
 
| none
 
| none
 
|-
 
|-
| Prowers
+
| [[Prowers County, Colorado|Prowers]]
| 11 Apr 1889
+
| 1889  Apr 11  
| Bent
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#PROWERS Details]
 +
| Bent  
 
| none
 
| none
 
|-
 
|-
| Pueblo
+
| [[Pueblo County, Colorado|Pueblo]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#PUEBLO Details]
 +
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Rio Blanco
+
| [[Rio Blanco County, Colorado|Rio Blanco]]
| 25 Mar 1889
+
| 1889  Mar 25  
| Summit
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#RIO%20BLANCO Details]
 +
| Summit  
 
| none
 
| none
 
|-
 
|-
| Rio Grande (del Norte)
+
| [[Rio Grande County, Colorado|Rio Grande]] (del Norte)  
| 10 Feb 1874
+
| 1874  Feb 10  
| Conejos, Costilla
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#RIO%20GRANDE Details]
 +
| Conejos, Costilla  
 
| none
 
| none
 
|-
 
|-
| Routt
+
| [[Routt County, Colorado|Routt]]
| 29 Jan 1877
+
| 1877  Jan 29  
| Grand
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#ROUTT Details]
 +
| Grand  
 
| Moffatt 1911
 
| Moffatt 1911
 
|-
 
|-
| Saguache
+
| [[Saguache County, Colorado|Saguache]]
| 29 Dec 1866
+
| 1866  Dec 29  
| Costilla
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#SAGUACHE Details]
 +
| Costilla  
 
| none
 
| none
 
|-
 
|-
| San Juan
+
| [[San Juan County, Colorado|San Juan]]
| 31 Jan 1876
+
| 1876  Jan 31  
| La Plata
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#SAN%20JUAN Details]
 +
| La Plata  
 
| Uncompahgre 1877
 
| Uncompahgre 1877
 
|-
 
|-
| San Miguel
+
| [[San Miguel County, Colorado|San Miguel]]
| 01 Nov 1861
+
| 1861  Nov 01  
 +
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#SAN%20MIGUEL Details]
 
| Colorado Territory  
 
| Colorado Territory  
 
| none
 
| none
 
|-
 
|-
| Sedgwick
+
| [[Sedgwick County, Colorado|Sedgwick]]
| 09 Apr 1889
+
| 1889  Apr 09  
| Logan
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#SEDGWICK Details]
 +
| Logan  
 
| none
 
| none
 
|-
 
|-
| Summit
+
| [[Summit County, Colorado|Summit]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#SUMMIT Details]
 +
| Colorado Territory  
 
| Eagle 1883, Garfield 1883, Grand 1874, Rio Blanco 1889
 
| Eagle 1883, Garfield 1883, Grand 1874, Rio Blanco 1889
 
|-
 
|-
| Teller
+
| [[Teller County, Colorado|Teller]]
| 23 Mar 1899
+
| 1899  Mar 23  
| El Paso
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#TELLER Details]
 +
| El Paso  
 
| none
 
| none
 
|-
 
|-
| Uncompaghre
+
| [[Uncompahgre County, Colorado|Uncompahgre]]
| 18 Jan 1877
+
| 1877  Jan 18  
| Hinsdale, San Juan
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#UNCOMPAHGRE Details]
 +
| Hinsdale, San Juan  
 
| renamed Ouray 1883
 
| renamed Ouray 1883
 
|-
 
|-
| Washington
+
| [[Washington County, Colorado|Washington]]
| 09 Feb 1887
+
| 1887  Feb 09  
| Weld, Arapahoe
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#WASHINGTON Details]
 +
| Weld, Arapahoe  
 
| Yuma 1889
 
| Yuma 1889
 
|-
 
|-
| Weld
+
| [[Weld County, Colorado|Weld]]
| 01 Nov 1861
+
| 1861  Nov 01  
| Colorado Territory
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#WELD Details]
 +
| Colorado Territory  
 
| Logan 1887, Morgan 1889, Washington 1887
 
| Logan 1887, Morgan 1889, Washington 1887
 
|-
 
|-
| Yuma
+
| [[Yuma County, Colorado|Yuma]]
| 15 Mar 1889
+
| 1889  Mar 15  
| Washington, Arapahoe
+
| [http://publications.newberry.org/ahcbp/documents/CO_Individual_County_Chronologies.htm#YUMA Details]
 +
| Washington, Arapahoe  
 
| none
 
| none
 
|}
 
|}
 +
0
 +
[[Category: United States County Creations]]

Revision as of 15:15, 13 August 2014


Name of County Date Formed Boundary
Changes
Parent County Counties Created by Boundary Changes
Alamosa 1913 Mar 08 Details Costilla, Conejos none
Arapahoe 1861 Nov 01 Details Colorado Territory Denver 1901, Washington 1887, Yuma 1889
Archuleta 1885 Apr 14 Details Conejos none
Baca 1889 Apr 16 Details Los Animas none
Boulder 1861 Nov 01 Details Colorado Territory none
City and County of Broomfield 2001 Nov 15 Details Adams, Boulder, Jefferson, Weld none
Carbonate 1861 Nov 01 Details Colorado Territory renamed Lake 1879
Chaffee 1879 Feb 10 Details Lake none
Cheyenne 1889 Mar 25 Details Bent, Elbert Kiowa 1889
Clear Creek 1861 Nov 01 Details Colorado Territory none
Conejos 1861 Nov 01 Details Colorado Territory Alamosa 1913, Archuleta 1885, Hinsdale 1874, La Plata 1874, Rio Grande 1874
Costilla 1861 Nov 01 Details Colorado Territory Alamosa 1913, Rio Grande 1874, Saguache 1866
Crowley
rap no
Details Bent, Otero none
Custer 1877 Mar 09 Details Fremont none
Delta 1883 Feb 11 Details Gunnison none
City and County of Denver 1901 Mar 18 Details Arapahoe none
Dolores 1881 Feb 19 Details Ouray none
Douglas 1861 Nov 01 Details Colorado Territory Elbert 1874
Eagle 1883 Feb 11 Details Summit none
Elbert 1874 Feb 02 Details Douglas Kit Carson 1889, Lincoln 1889
El Paso 1861 Nov 01 PASO Details Colorado Territory Teller 1899
Fremont 1861 Nov 01 Details Colorado Territory Custer 1877
Garfield 1883 Feb 10 Details Summit none
Gilpin 1861 Nov 01 Details Colorado Territory none
Guadalupe 1861 Nov 01 Colorado Territory Details renamed Conejos 1861 none
Gunnison 1877 Mar 09 Details Lake Delta 1883, Mesa 1883, Montrose 1883, Pitkin 1881
Hinsdale 1874 Feb 10 Details Conejos Mineral 1893, Ouray 1877, Uncompahgre 1877
Huerfano 1861 Nov 01 Details Colorado Territory Los Animas 1866
Jackson
May 05
Details Grand, Larimer none
Jefferson 1861 Nov 01 Details Colorado Territory none
Kiowa 1889 Apr 11 Details Cheyenne, Bent none
Kit Carson 1889 Apr 11 Details Elbert none
Lake 1879 Feb 10 Details renamed from Carbonate Chaffee 1879, Gunnison 1877
La Plata 1874 Feb 10 Details Conejos, Lake Montezuma 1889, San Juan 1876
Larimer 1861 Nov 01 Details Colorado Territory Jackson 1909
Las Animas 1866 Nov 09 Details Huerfano Baca 1889
Lincoln 1889 Apr 11 Details Elbert none
Logan 1887 Feb 02 Details Weld Phillips 1889, Sedgwick 1889
Mesa 1883 Feb 14 Details Gunnison none
Mineral 1893 Mar 27 Details Hinsdale none
Moffat 1911 Feb 27 Details Routt none
Montezuma 1889 Apr 16 Details La Plata none
Montrose 1883 Feb 11 Details Gunnison none
Morgan 889 Feb 19 Details Weld none
Otero 1889 Feb 19 Details Bent Crowley 1911
Ouray 1883 Mar 02 Details renamed from Uncompahgre Dolores 1881, San Miguel 1861
Park 1861 Nov 01 Details Colorado Territory none
Phillips 1889 Mar 27 Details Logan none
Pitkin 1881 Feb 23 Details Gunnison none
Prowers 1889 Apr 11 Details Bent none
Pueblo 1861 Nov 01 Details Colorado Territory none
Rio Blanco 1889 Mar 25 Details Summit none
Rio Grande (del Norte) 1874 Feb 10 Details Conejos, Costilla none
Routt 1877 Jan 29 Details Grand Moffatt 1911
Saguache 1866 Dec 29 Details Costilla none
San Juan 1876 Jan 31 Details La Plata Uncompahgre 1877
San Miguel 1861 Nov 01 Details Colorado Territory none
Sedgwick 1889 Apr 09 Details Logan none
Summit 1861 Nov 01 Details Colorado Territory Eagle 1883, Garfield 1883, Grand 1874, Rio Blanco 1889
Teller 1899 Mar 23 Details El Paso none
Uncompahgre 1877 Jan 18 Details Hinsdale, San Juan renamed Ouray 1883
Washington 1887 Feb 09 Details Weld, Arapahoe Yuma 1889
Weld 1861 Nov 01 Details Colorado Territory Logan 1887, Morgan 1889, Washington 1887
Yuma 1889 Mar 15 Details Washington, Arapahoe none
0
  1. [http://historical-county.newberry.org/website/Colorado/viewer.htm Colorado Atlas of Historical County Boundaries, John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Gordon DenBoer, Historical Compiler; Douglas Knox, Book Digitizing Director and Digital Compiler; Emily Kelley, Research Associate; Laura Rico-Beck, GIS Specialist; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant. Copyright The Newberry Library 2008.