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How to Research Your Family History in Wyoming

Wyoming is the least populous state, and that is a research advantage: the paper trail is thin but centralized, the State Archives can often answer a family question by mail, and the whole run of the state’s newspapers is digitized free. The records themselves follow the ranching-and-railroad story – homestead case files, livestock brand books (a genuinely genealogical source here), Union Pacific towns born in 1867–68, and coal camps – with a territorial assembly rule to open (before 1869, route events to the neighboring territories by geography) and the Wind River nations’ deep federal trail on the other side of the state.

Start With Vital Records

Statewide birth and death registration began in July 1909 under Vital Statistics Services; births are restricted for 100 years and deaths for 50, after which the records open through the Wyoming State Archives. Pre-1909 events lean on county registers where they exist, church books, and – above all in Wyoming – the newspapers.

Marriages are county records from each county’s founding (1869 in the original counties), recorded with the County Clerk; divorces are District Court files with the Clerk of District Court. Early Wyoming’s mobile population means a couple could marry in a rail town, homestead two counties over, and divorce in a third – search wide.

The County: Two Clerks

Wyoming Territory was assembled in 1869 from pieces of Dakota, Utah, and Idaho territories: route pre-1869 events by geography to those systems (the Fort Laramie and emigrant-trail era generated military and trail records rather than county ones – post returns, emigrant registers, and trail diaries fill the earliest layer). The original five counties, stacked north-to-south along the railroad, subdivided to 23; chart the chain, since a ranch that never moved crossed several county lines on paper.

  • County Clerk – deeds, mortgages, and the marriage records: the recording one-stop.
  • Clerk of District Court – probate files (District Court is Wyoming’s probate venue – a distinct office from the County Clerk), divorces, civil and criminal cases, and naturalizations.
  • Assessor rolls and – distinctively – the brand records tie families to their livestock and range.

The State Archives And The Free Newspapers

The Wyoming State Archives (Cheyenne) holds the territorial and state record, county microfilm, the aged-out vital records, institutional registers, and the brand books – the recorded livestock brands, with their owners, dates, and transfers, which in ranching Wyoming function as a property-and-succession record: a brand passing from father to widow to son documents a family transition no certificate captures. The companion gift is Wyoming Digital Newspapers: the state’s newspaper run digitized and free – and in a state that registered late and sparsely, the papers are the vital records: births, marriages, deaths, brand sales, homestead provings, and lawsuits, all name-searchable. Between the Archives and the newspapers, most Wyoming questions have a free first answer.

Homesteads And The Range

The homestead file is Wyoming’s central family document, as everywhere in the high plains: BLM patents free online, case files at the National Archives with the residency and improvement affidavits – and Wyoming’s stock-raising and desert-land entries (the 640-acre Stock-Raising Homestead Act era especially) document the ranching generation’s proving-up in detail. Railroad-grant purchases along the Union Pacific corridor appear in county deed books and UP land-department records. The Johnson County War era’s court and inquest records, and the big cattle companies’ archives (the American Heritage Center at the University of Wyoming, Laramie, holds a superb ranching, railroad, and business manuscript base), add the range-conflict texture.

Rail Towns And Coal Camps

Cheyenne, Laramie, Rawlins, and Rock Springs were born with the Union Pacific in 1867–69: railroad employment and pension records, division-point directories, and the UP hospital association materials document the railroading families. Rock Springs’ and the southwest’s coal camps drew Chinese miners (through the 1885 massacre – its investigation records name the community), then Finnish, Slavic, Italian, Greek, and Japanese workers: work the company records, the ethnic lodges and parishes, and the mine-inspector fatality reports.

Wind River Research

The Wind River Reservation is home to the Eastern Shoshone and Northern Arapaho nations. The federal trail runs deep: treaty records (Fort Bridger), BIA agency censuses (annual for decades), allotment files, ration and annuity rolls, and the government and mission school records (St. Stephens and St. Michael’s registers among them), held by the National Archives (the Denver-area facility serves Wyoming) and the missions’ archives. Enrollment authority belongs to each nation.

Online And Free

Wyoming Digital Newspapers is free. BLM patents are free. The Archives’ indexes and reference service are free. FamilySearch carries the county marriage, probate, deed, and naturalization runs. Subscription platforms add censuses and directories, free through Wyoming libraries. And a closing note for the record: Wyoming Territory gave women the vote and jury service in 1869 – so women appear in Wyoming’s civic records (voter rolls, juror lists, office-holding) a half-century earlier than almost anywhere else in the country. Look for your great-grandmothers there.

Research Checklist

  1. Search the free digitized newspapers first – they are Wyoming’s vital records.
  2. Pull the homestead or stock-raising case file for every ranch family.
  3. Remember the two clerks: County Clerk (deeds, marriages), Clerk of District Court (probate, divorces).
  4. Trace the family brand through the Archives’ brand books.
  5. Route pre-1869 events to Dakota, Utah, or Idaho territory by geography; use fort and trail records for the earliest era.
  6. Wind River ancestry: agency censuses and mission registers via NARA Denver, with the nations for enrollment.

Sources and References