Colorado Census

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1880 United States Census– A Free Internet Index and Images to the US Census can be viewed on the Family Search Record Pilot – Pilot Site. This index includes an every name index to population schedules listing inhabitants. It includes the full name, race, sex, age, birth month (if born during the previous year), relationship to head of household, whether married, single or divorced, whether married during the previous year, country or state of birth of each person and his parent’s, occupation and street address and house number.                                        

1860 United States Census—A free Internet index and images to the 1860 United States Census can be viewed on the FamilySearch Record Search – Pilot Site. This index includes every name listed on the census and is linked to an image including information about each person’s residence and age in 1860, birthplace, occupation, other family members, whether married or single, and neighbors.

1870 United States Census---A free internet index and images can be viewed on FamilySearch Record Pilot site. This index includes the full name, age, sex, race, birthplace, occupation, month if born in census year, month if married in census year, birth place of father and mother, if born in a foreign country.

1890--The federal census was destroyed.

1900 Federal Census - A free Internet index and images to the 1900 United States Census can be viewed on the  FamilySearch Record Search – Pilot Site. Important additions to this census are month and year of birth of each household member, number of years married for each married person, number of children born to each mother and the number of those still living, year of immigration, and number of years in the United States.

Historical Background

1876--Colorado became a state. Prior to statehood, Colorado was part of divided among the territories of Kansas, Nebraska, Utah, and New Mexico.


Online Indexes

Use available online indexes to locate your Colorado ancestors.  Online indexes are available at:


Heritage Quest Online:

Soundex (phonetic) Indexes 

1880--partial Soundex index exists

1900--Soundex index available

1910--Use the Denver Street Index (Family History Library fiche 6331481) to help locate individuals in the census.

1920--Soundex index available

Special Indexes

Colorado Historical Society has a card index to the 1860 census. Separate indexes for the Nebraska and New Mexico portions are included in the 1860 indexes for those territories. An index to Arapahoe County, Kansas (where most of Colorado's 1860 population lived) is found in search 7A on the AIS census index on microfiche. An 1870 Colorado Territory census and index are also at the Family History Library.  

Special Censuses

Mortality Schedule

Both the 1860 and 1870 censuses include mortality schedules.

State Censuses

1885--Colorado took a state census. 

Family History Library Book 978.852 X2c

Territorial Censuses

An 1860 federal territorial census was taken in the four territories from which Colorado was created. 

Northeastern Section-- enumerated with Nebraska 1860 census schedules designated "unorganized territory."

Central Eastern section-- enumerated with Arapahoe County, Kansas Territory.

Southeast section-- enumerated in parts of Taos and Mora Counties of New Mexico Territory.Since half of the state of Colorado, included in the Utah Territory was not settled, no census was taken in that area.

Web Sites


Heritage Quest Online:

Census Online:

Genealogy Today:

Access Genealogy:

Census Finder:


RootsWeb: use with:

Colorado State Archives:

Colorado Historical Society:

Mortality Schedules:


 Colorado Research Outline. Salt Lake City, Utah: Intellectual Reserve Inc., Family History Department, 1998, 2001.