Montana Genealogy

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Montana Genealogy Research Guide

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Montana Genealogy Research Guide

Quick Facts

Montana entered the Union as the 41st state on November 8, 1889, at the tail end of a mining and homesteading frontier. Its country passed through several older territories before Congress organized Montana Territory in 1864, and its records carry the stamp of that federal, public-domain origin — homesteads and land patents from the government, and deeds, probate, marriages, and early vital records kept county by county. Understanding that jurisdictional layering is the key to tracing a Montana family.

• Capital: Helena. The territorial seat moved from Bannack (1864) to Virginia City (1865) and finally to Helena in 1875, where it remained at statehood.
• Statehood: November 8, 1889, the 41st state, formed from Montana Territory, which Congress created on May 26, 1864, chiefly out of Idaho Territory.
• Counties: 56. The first counties were organized by the first territorial legislature in 1865; the last, Petroleum County, was carved out in 1925 during the homestead era.
• Land type: Montana is a federal (public-domain) state, not a state-land state. Original title passed from the United States to settlers — largely through homesteads and other entries patented by the General Land Office — so the foundational land records are federal (now administered by the Bureau of Land Management), while later transfers between individuals are recorded as deeds at the county level.
• Nickname and motto: the Treasure State (also “Big Sky Country”); the state motto is Oro y Plata ("Gold and Silver").
• Where records live: most genealogical records — deeds, probate, marriages, naturalizations, and pre-1907 births and deaths — are kept at the county level by the county clerk and recorder and the clerk of the district court. There is no separate municipal vital-records system; every county reports to the same state framework.

Libraries and Archives

Montana’s research collections cluster in Helena, home to the state’s combined archives and historical society, with regional depth in the university and public libraries and in the federal records center that serves the Rocky Mountain region. The principal Montana repositories include:

• Montana Historical Society Research Center (Helena) — the official archives of the State of Montana and the state historical society, established in 1865; government records, manuscripts, vital-record and naturalization indexes, military service and enlistment records, territorial and county court records, tax assessment rolls, newspapers, photographs, and maps.
• Montana State Library (Helena) — statewide library services and the digital collections of the Montana History Portal.
• National Archives at Denver — federal census, court, naturalization, military, and Bureau of Indian Affairs agency records for Montana.
• Montana State Genealogical Society — the statewide society; publisher of the Big Sky Roundup, with free indexes including a statewide death registry and the Norski i Montana project.
• Maureen and Mike Mansfield Library, University of Montana (Missoula) — Archives and Special Collections for western Montana history, labor, and Native American materials.
• Montana State University Library (Bozeman) — the Merrill G. Burlingame Special Collections, strong in agriculture, homesteading, and regional history.
• Parmly Billings Library — its Montana Room and the Yellowstone Genealogy Forum collections for the Yellowstone Valley.
• The Diocese of Helena (western Montana) and the Diocese of Great Falls–Billings (eastern Montana) hold the Catholic mission and parish registers that are essential before civil registration.
• The FamilySearch Library and its worldwide FamilySearch Centers hold extensive Montana microfilm and digital collections, and county courthouses (the County Clerk and Recorder and the Clerk of the District Court), county historical societies, and the Butte-Silver Bow Public Archives hold records for their own areas.

Major Websites

These sites host digitized Montana records and indexes. Subscription sites are marked ($).

• FamilySearch — free; the backbone finding aid, with the FamilySearch Wiki, catalog, and large digitized collections of Montana county birth, death, marriage, probate, land, court, and naturalization records.
• Ancestry ($) — extensive Montana vital, census, naturalization, military, land, probate, and tax collections.
• MyHeritage ($) — Montana vital records, censuses, and immigration collections.
• Findmypast ($) — Montana county marriage and birth and death collections.
• Montana History Portal — free; the state’s digital collections, including newspapers, photographs, military enlistment cards, prison records, livestock brand registrations, and local histories.
• Montana Newspapers — free; the Historical Society’s full-text archive of digitized Montana newspapers.
• Chronicling America — free; the Library of Congress newspaper archive.
• Bureau of Land Management General Land Office Records — free; federal land patents for homesteads and other entries.
• Internet Archive and HathiTrust — free; digitized Montana histories, published record abstracts, and territorial and state law books.
• Find a Grave and BillionGraves — free; cemetery listings, photographs, and transcriptions.

Law and Government

Montana’s territorial and state statutes explain the jurisdictions and offices that produced its genealogical records, and many of the foundational volumes have been digitized and are free to read.

• The Laws of the Territory of Montana (session laws) begin with the first legislature that met at Bannack in 1864 and adopted the territory’s first code — the “Bannack Statutes” — with successive sessions following; the third-session laws of 1866 are free on HathiTrust.
• The Codes and Statutes of Montana in Force July 1, 1895 — the first comprehensive state codification — is free on HathiTrust.
• The Revised Codes of Montana of 1907 are free on HathiTrust, with the 1915 supplement free on the Internet Archive.
• A Historical Sketch of the State Law Library of Montana recounts the Organic Act of 1864 and the first territorial justices, useful for learning which courts created which records.
• The current Montana Code Annotated is on the Montana State Legislature site, and the annual session laws and earlier revised codes are digitized on the Internet Archive and HathiTrust.

Vital Records (Birth, Marriage, Death)

Statewide civil registration of births and deaths began in 1907, supervised by the state Bureau of Vital Statistics, and became reasonably complete only around 1915–1920. An 1895 law had directed physicians, midwives, clergy, coroners, and undertakers to register births and deaths, but compliance was thin, and a handful of counties kept records even earlier — Silver Bow County births reach back to 1878 and Yellowstone County deaths to 1884. Marriages have never been registered statewide; each county recorded them from the time it was organized. There is no separate municipal vital-records system.

Pre-1907 births and deaths are held by the county clerk and recorder in the county where the event occurred; certified 1907-and-later births and deaths are ordered from the state Office of Vital Statistics under access limits (recent births are restricted to immediate family). Marriage and divorce records are held by the clerk of the district court, and the state keeps an index to marriages and divorces from 1943 that identifies the county. Use these online indexes to find a record, then order the original:

• Deaths (statewide, from the 1860s): Montana State Deaths, 1907–2018 ($), which also picks up scattered earlier deaths; the Montana Death Index, 1860–2007 is free on FamilySearch, and the Montana State Genealogical Society hosts free death-registry indexes.
• Births and deaths (county): Montana County Births and Deaths, 1840–2004 is free on FamilySearch and also on Ancestry ($); a searchable Montana Birth Index, 1870–1986 is on Ancestry ($).
• Marriages (county, from 1865): Montana County Marriages, 1865–1987 ($) with images; the Montana County Marriages, 1865–1950 index and images are free on FamilySearch and also on MyHeritage ($).

History and Timeline of Major Events

Key dates that shaped Montana’s jurisdictions and records:

• 1805–1806 — The Lewis and Clark Expedition crosses the region.
• 1807 — Manuel Lisa builds Fort Raymond at the mouth of the Bighorn, opening the fur-trade era.
• 1841 — Father Pierre-Jean De Smet founds St. Mary’s Mission in the Bitterroot Valley, the first permanent non-Indigenous settlement.
• 1862 — Gold is struck at Grasshopper Creek; Bannack springs up.
• 1863 — Gold at Alder Gulch founds Virginia City; Idaho Territory is created, briefly uniting the region.
• May 26, 1864 — Congress creates Montana Territory from Idaho Territory, with Bannack as first capital.
• 1864–1865 — The first territorial legislature meets at Bannack, the vigilante movement suppresses road agents, the capital moves to Virginia City, and the first counties are organized.
• 1875 — The territorial capital moves to Helena.
• 1876 — The Battle of the Little Bighorn.
• 1877 — The Nez Perce War, including the Battle of the Big Hole in western Montana.
• 1883 — The Northern Pacific Railroad is completed across Montana at Gold Creek.
• November 8, 1889 — Montana is admitted as the 41st state.
• 1893 — The Great Northern Railway is completed across the northern “Hi-Line.”
• 1900s–1910s — The homestead boom, spurred by the Enlarged Homestead Act of 1909 and aggressive railroad promotion, fills the eastern plains and drives a wave of new-county creation.
• 1917–1918 — World War I; Montana sends soldiers at a high per-capita rate.
• 1917–1920s — Drought and the collapse of dryland homesteading bring bank failures and out-migration.
• 1925 — Petroleum County, the last of the state’s 56 counties, is created.

Census Records and Substitutes

Federal censuses capture Montana as a territory in 1870 and 1880 and as a state from 1890 (the 1890 schedules were destroyed nationally) through 1950. In 1860, before the territory existed, the small non-Native population west of the Continental Divide was enumerated with Washington Territory (the Bitterroot Valley and Ponderay area) and the eastern country with the unorganized parts of Nebraska and Dakota Territories; a published index reconstructs the Montana portion. The federal censuses are free on FamilySearch and searchable on Ancestry ($) and MyHeritage ($).

State censuses. Montana never took regular territorial or state population censuses, so there is no year-by-year state series to fill the gaps between the federal years — a notable contrast with many eastern states, and a reason to lean harder on the substitutes below.

Substitutes. An early “list of settlers” who wintered in the mining country in 1862–1863 was printed in the Contributions to the Historical Society of Montana. For placing a family in a particular year, the best substitutes are city directories (Butte, Helena, Great Falls, Billings, Anaconda, Bozeman, and other towns), voter registrations, and tax assessment rolls, many of them held by the Montana Historical Society and digitized on the Montana History Portal.

Church Records

Because civil registration is late, church records are the most important substitute for vital records before 1907. The Roman Catholic church came first, through Jesuit missions to Native peoples, and it remains the largest denomination; Methodist, Presbyterian, and Episcopal congregations followed the mining towns, and Lutheran churches accompanied the Scandinavian and German homesteaders of the plains. Catholic mission and parish registers, and Lutheran and other Protestant registers, are especially useful as vital-record substitutes.

• St. Mary’s Mission in the Bitterroot (1841) and St. Ignatius Mission served the Salish, Pend d’Oreille, and Kootenai; their baptism and marriage registers, and those of later parishes, are held through the Diocese of Helena (western Montana) and the Diocese of Great Falls–Billings (eastern Montana).
• Mission registers documenting Native American families are described among the Catholic Indian mission records preserved by Marquette University, and thousands of congregational registers — Catholic, Methodist, Presbyterian, Episcopal, and Lutheran — can be located through the FamilySearch Catalog by county and town.

Court Records

Montana’s courts were reorganized at the change from territory to state, and their records reach well beyond lawsuits into estates, guardianships, naturalizations, and divorces. The main courts a researcher encounters are:

• Probate courts (territorial, 1864–1889) — wills and administrations during the territorial period.
• District Courts, in each county since statehood — the principal trial courts, which hold probate, civil and criminal cases, divorces, and (through the 1920s) naturalizations; the Clerk of the District Court is the key county custodian for these records.
• Justice courts — minor civil and criminal matters at the local level.
• The Montana Supreme Court — the appellate court, whose reported decisions appear in the Montana Reports and the Pacific Reporter.

Territorial court records and early state civil and criminal cases are described among the Montana Historical Society holdings and are increasingly digitized county by county on FamilySearch.

Ethnic/Minority Records

Montana’s peoples settled in distinct places, and knowing where a group lived points to the records most likely to document a family.

• Native nations. Montana has seven reservations: the Blackfeet (Browning); the Crow (Apsáalooke) (Crow Agency); the Northern Cheyenne (Lame Deer); the Confederated Salish and Kootenai Tribes of the Flathead Reservation (Salish, Pend d’Oreille, and Kootenai); the Assiniboine and Gros Ventre at Fort Belknap; the Assiniboine and Sioux at Fort Peck; and the Chippewa Cree at Rocky Boy’s. The Little Shell Tribe of Chippewa (Métis), long landless, is centered on Great Falls. Bureau of Indian Affairs agency records are held at the National Archives at Denver, whose Montana Indian agency guide lists the records by reservation.
• Irish and Cornish. Butte’s copper mines drew Irish and Cornish (“Cousin Jacks”) miners in large numbers; Catholic parish, cemetery, and union records and the Butte-Silver Bow Public Archives are central sources.
• Chinese. Chinese miners and laborers lived in the placer camps and along the railroads; look to census, court, and newspaper records.
• Scandinavians, Finns, and German-Russians. The great homestead wave settled Norwegians, Swedes, Finns, and Volga-German (German-Russian) families across the northern and eastern plains; the Montana State Genealogical Society’s Norski i Montana index, Lutheran congregational registers, and homestead files are key.

Immigration and Naturalization

Montana has no ocean port, so immigrants arrived through other U.S. ports and overland from Canada. Border-crossing records are therefore the distinctive immigration source, and naturalizations are scattered across many courts before they were federalized.

• Border crossings. United States–Canada crossing records document the Montana ports of entry — Sweet Grass, Gateway, Chief Mountain, Cut Bank, Del Bonita, Great Falls, Roosville, and Babb — roughly from 1917 to the 1950s; they are indexed in U.S. Border Crossings from Canada, 1895–1960 ($) and free on FamilySearch (Montana Manifests of Immigrant Arrivals and Departures, 1923–1956).
• Naturalization. Before 1906 any territorial or district court could naturalize, so records are scattered; after 1906 the process was federalized. Key finding aids are Montana Federal Naturalization Records, 1870–1999 ($) and Montana County Naturalization Records, 1867–1970 ($); free county naturalizations (1856–1979) and statewide naturalization records (1868–1999) are on FamilySearch. The Montana Historical Society holds indexes to the territorial and federal court naturalizations (1868–1929), and the National Archives at Denver holds the federal naturalizations.

Land Records

As a federal public-domain state, Montana’s first titles came from the United States rather than from a colony or the state, so the federal land records are the starting point and the later transfers are county records. Most Montana homesteaders proved up under the Homestead Act of 1862 and, especially, the Enlarged Homestead Act of 1909, which touched off the great dryland-farming boom.

Where the records are kept.

• Federal patents: the Bureau of Land Management General Land Office Records site provides free images of the final land patents; pair each patent with the underlying land-entry case file at the National Archives, which holds the homestead application, proof, and testimony (cite the land office and certificate number).
• Federal land offices: district land offices operated over time at Helena, Bozeman, Miles City, Missoula, Great Falls, Havre, Glasgow, Lewistown, Kalispell, and Billings, each serving a surrounding land district.
• County level: deeds and mortgages recording later transfers are kept by the county clerk and recorder.

The railroad land grant. The Northern Pacific Railroad, chartered by Congress in 1864, received an enormous checkerboard grant of alternating sections across the width of Montana — the largest single-state share of the transcontinental land grants. Much of it was later sold to timber and mining interests, and whether a parcel fell in an odd-numbered railroad section or an even-numbered government section tells you whether to look in railroad land-department records or in the federal homestead records.

Online, FamilySearch Full-Text Search makes many unindexed Montana deeds, mortgages, and patents searchable by every name they contain, including grantors, grantees, witnesses, and neighbors, and county land records are increasingly digitized within the county record collections on FamilySearch.

Military Records

Montana had no part in the Revolution or the War of 1812, but its military records begin with the Indian Wars and run through the world wars; the Montana Historical Society is the central state repository.

• Indian Wars (1860s–1890s): the Little Bighorn (1876) and the Nez Perce War and Battle of the Big Hole (1877); frontier-fort and regular-army records are at the National Archives, with service records and indexes on FamilySearch.
• Civil War: few resident veterans served, but many settled in Montana afterward and organized Grand Army of the Republic posts.
• Spanish-American War and World War I: the Montana Historical Society holds Adjutant General service and enlistment records, and Military Enlistments and World War I enlistment cards are digitized free on the Montana History Portal; Montana Military Records, 1904–1918 ($) are on Ancestry, and the World War I and World War II draft-registration cards are free on FamilySearch. Veterans’ discharge records are filed with county clerks.

Probate Records

Probate — wills, administrations of intestate estates, and guardianships of minors — is among the richest sources for family relationships. The dividing line is the change from territory to state.

• Territorial period (1864–1889): probate courts proved wills and administered estates.
• Statehood onward: the District Court in each county, through its Clerk of the District Court, proves wills, grants administrations, and appoints guardians; the estate file — petition, will or letters, bond, and inventory — usually names the heirs.

Online, Montana Wills and Probate Records, 1866–1965 ($) is name-searchable across most counties, many county probate collections are free on FamilySearch, and FamilySearch Full-Text Search makes many unindexed wills and estate files searchable by every name they contain.

Tax Records

Tax lists place a family in a specific town and year and are valuable substitutes where censuses or deeds are missing; several consecutive years can reveal when a young man came of age, moved, or died and left heirs.

• U.S. IRS Tax Assessment Lists, 1862–1918 ($) — the Civil War–era and later federal income, license, and luxury taxes, which include the assessment lists for the newly organized Montana Territory of the 1860s and early 1870s.
• The Montana Historical Society holds territorial and county tax assessment rolls, and county treasurers and assessors hold the later property and personal-property rolls.