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How to Research Your Family History in Montana

Montana filed more homestead claims than any state in the union, and that fact organizes its genealogy: for most Montana families, the richest single document is a federal homestead case file, thick with affidavits about who lived where, since when, with whom, and what they built. Around the homestead record sit a courthouse system with one placement quirk (marriages live with the Clerk of District Court), the Butte mining world and its immigrant communities, the fur-trade and Métis records that predate the territory, and eight tribal nations whose federal record trails run deep.

Start With Vital Records

Statewide birth and death registration began in 1907 under what is now the Montana Department of Public Health and Human Services, with compliance firming up through the 1910s. Montana’s access windows are comparatively short – older certificates become available as informational copies relatively quickly (confirm current rules with DPHHS) – and pre-1907 events survive, where they survive at all, in scattered county registers, church books, and the substitutes below.

The placement quirk: marriage licenses and records are kept by the Clerk of District Court in each county – not the County Clerk and Recorder – and divorces are District Court cases with the same office. Marriage runs reach back to each county’s founding (1860s in the originals).

The County Courthouse

Montana Territory was created in 1864 from Idaho Territory (with earlier eastern pieces under Dakota); the original counties subdivided into 56, most new counties arriving in the homestead-boom decade. Chart parent counties – a family who never moved may have “changed counties” three times between 1910 and 1925.

  • Clerk of District Court – marriages, divorces, probate files (wills, estates, guardianships – District Court is Montana’s probate court), civil and criminal cases, and naturalizations.
  • County Clerk and Recorder – deeds, mortgages, and mining claim location records.
  • Assessor/Treasurer – tax rolls for the annual trail.

The Homestead Deep End

The Enlarged Homestead Act of 1909 triggered the great Montana land rush – the “honyocker” years – followed by drought and bust after 1919 that emptied whole townships. Research both ends of it: the BLM General Land Office site (free) locates every patent; the case files at the National Archives hold the filings, proofs, witness affidavits, and improvement descriptions that amount to a settlement-era family biography – and for claims abandoned in the bust, the relinquishment paperwork documents the leaving. County deed and tax books then show the consolidations. No Montana research plan should skip the land file.

The Montana Historical Society

The Historical Society’s Research Center in Helena is the statewide hub: state archives holdings, county record microfilm, a superb Montana newspaper collection (heavily digitized – small-town papers carried the vital notices the state never registered), biographical and vertical files, mining company records, and oral histories. Its indexes and digitized newspapers are the standard rescue when county paper is thin.

Butte And The Mining Communities

Butte was the richest hill on earth and one of the most Irish cities in America, alongside Cornish, Serbian, Croatian, Finnish, Italian, and Chinese communities. Work the mine-company employment and accident records (Anaconda materials survive in archival collections), Catholic and Orthodox parish registers, ethnic fraternal societies, coroner files, and Butte’s dense city directories. The Butte-Silver Bow Public Archives is a nationally notable local repository – one of the best city archives in the West – and holds much of this in one place.

Tribal Nations Research

Montana is home to the Blackfeet, Crow, Northern Cheyenne, Confederated Salish and Kootenai, Assiniboine and Sioux (Fort Peck), Assiniboine and Gros Ventre (Fort Belknap), Chippewa Cree, and Little Shell Chippewa nations. The record trail is chiefly federal: BIA agency censuses (annual for decades), allotment files (the Flathead and Crow allotment eras generated detailed family records), treaty and annuity rolls, and boarding-school records, held by the National Archives (the Denver-area facility serves Montana), alongside Jesuit and other mission registers. The Little Shell’s long landless history produced its own distinctive documentation, including the Roe Cloud-era rolls. Enrollment authority belongs to each nation. Métis family lines connect through fur-trade records, Catholic mission registers, and Canadian scrip files.

Online And Free

BLM patents are free. The Historical Society’s digitized newspapers are free. FamilySearch carries filmed Montana county marriage, probate, deed, and naturalization records. Subscription platforms add censuses (Montana appears federally from 1870; the 1880s territorial fragments are thin), directories, and the newspaper base, free through Montana public libraries.

Research Checklist

  1. Pull the family’s BLM patents, then order the homestead case file – the central Montana document.
  2. Remember marriages and probate live with the Clerk of District Court; deeds with the Clerk and Recorder.
  3. Chart the boom-era county splits before declaring a record missing.
  4. Mine the digitized newspapers for the vital events the state never captured.
  5. Butte line? Start at the Butte-Silver Bow Public Archives and the parish registers.
  6. Tribal ancestry: BIA agency censuses and allotment files via NARA Denver, with the nations for enrollment.

Sources and References