Sweetwater County, Wyoming Genealogy

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United States Gotoarrow.png Wyoming Gotoarrow.png Sweetwater County

Guide to Sweetwater County Wyoming genealogy. Birth records, marriage records, death records, census records, family history, and military records.

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Online Records

Sweetwater County, Wyoming
Map of the U.S. highlighting Wyoming
Location of Wyoming in the U.S.
Founded December 27, 1867
County Seat Green River
Address Sweetwater County Courthouse
80 W Flaming Gorge Way
PO Box 730
Green River, WY 82935
Phone: 307.872.6400
Sweetwater County Website


Parent County

Formed from the western half of Laramie county 27 Dec 1867 (Laramie county originally encompassed the entire state). Originally named Carter county and original county seat South Pass City. The county was renamed Sweetwater by the first Wyoming Legislative Assembly. The county seat was moved to Green River in 1873.

Boundary Changes

Record Loss


Populated Places

Arrowhead Springs Creston Junction Kanda Red Desert Superior
Bairoil Dines (hist.) Little America Reliance Sweeney Ranch
Bitter Creek Eden McKinnon Riner Table Rock
Blairtown Farson Monell Robinson Thayer Junction
Bryan Fort La Clede (hist.) North Rock Springs Rock Springs Tipton
Burntfork Granger Point of Rocks Salt Wells Wamsutter
Clearview Acres Green River Purple Sage South Superior Washam
Creston James Town Quealy Squaw Hollow (hist.) Winton

Neighboring Counties



Bryan "Railroad Section" 978.785 V3m, 978.785 V3ma
Farson, Eden Valley Cemetery 978.785 V3ma
Green River 978.785/G1 V3s
Green River, Riverview Cemetery. City cemetery listing at Parks & Recreation. Also indexed at findagrave.com.
978.785 V3m, 978.785 V3ma
Rock Springs, City Cemetery: Mountain View Section, St. Joseph's Section, Paul J. Wataha Memorial Park Section. All standing and readable stones were photographed as of May 2011, indexed at findagrave.com.
978.785/R1 V3r (some obituary records)
Rock Springs, Rest Haven Memorial Garden 978.785 V3ma
Superior 978.785/S1 V3b, 978.785 V3ma


For tips on accessing Sweetwater County, Wyoming Genealogy census records online, see: Wyoming Census.


LDS Ward and Branch Records

  • Green River, McKinnon, Reliance, Rock Springs,Rock Springs 1st, Rock Springs 2nd, Superior and Winton .



Local Histories



Early migration routes to and from Sweetwater County, Wyoming Genealogy for European and African American settlers included:




The bulk of the probate case files from the 1870's to the 1940's have been transferred to the Wyoming State Archives in Cheyenne. Check their website for additional details.



County Clerk has marriage records from 1864 and land records from 1876; Clerk Distric Court has divorce, probate and court records[5]


Vital Records

924 marriages from 7 Jun 1870 to 25 Jun 1904 are listed on the Western States Marriage Index.

Marriage index, formation of county to May, 2011 available as a spreadsheet at Sweetwater County GenWeb.

Societies and Libraries

Family History Centers

Web Sites

  • USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
  • Genealogy Trails: Sweetwater County Site. A Volunteer project dedicated to making genealogy records free to the public. Includes links to births, marriages and deaths; newspaper stories obituaries, censuses, military data, and more.
  • Family History Library Catalog


  1. Jim Tompkins, "The Oregon Trail 1841-1848 Map IV" in Oregon Trail Landmarks at http://www.oregonpioneers.com/OTMap4.jpg (accessed 18 July 2011).
  2. "Oregon California Trails Association" at http://octatrails.micromaps.com/ (accessed 18 July 2011).
  3. "The Pioneer Story: The Mormon Pioneer Trail" in The Church of Jesus Christ of Latter-day Saints at http://lds.org/gospellibrary/pioneer/pioneerstory.htm (accessed 18 July 2011).
  4. Wikipedia contributors, "Cherokee Trail" in Wikipedia: the Free Encyclopedia at http://en.wikipedia.org/wiki/Cherokee_Trail (accessed 19 July 2011).
  5. The Handybook for Genealogists : United States of America, 10th ed., (Draper, UT: Everton Publishers, 2002), p. 767. Sweetwater County, Wyoming