Maps of Montana are an invaluable area of genealogy and family history research, notably if you live far from where your ancestor was living.
Due to the fact that Montana’s political boundaries have frequently changed over the years, historic maps are significant in helping you uncover the precise location of your ancestor’s hometown, just what land they owned, who their neighbors ended up being, and much more besides.
Maps of Montana are an outstanding source for getting started with your research, given that they provide you with excellent information and facts instantly and in a clear format.
Montana maps are helpful when it comes to researching your family background, especially considering that some of the local towns no longer exist. Numerous types of maps can be sourced which will help in finding land, mining claims, ghost cities, or ranches.
Montana borders North Dakota, Idaho, Wyoming, South Dakota, British Columbia, Canada, and Alberta, Canada to the north. Montana’s 10 largest cities are Billings, Missoula, Great Falls, Bozeman, Butte-Silver Bow, Helena, Kalispell, Havre, Anaconda–Deer Lodge County, and Miles City.
Learn more historical facts about Montana counties here.
Interactive Map of Montana County Formation History
AniMap Plus 3.0, with the permission of the Goldbug Company
List of Every Montana County
Beaverhead County
Located in the southwestern part of the state, Beaverhead County was established in 1865 and has a population of approximately 9,200.
Big Horn County
Big Horn County was established in 1913 and is located in the southern part of Montana. Its population is around 13,000.
Blaine County
Founded in 1912, Blaine County is located in north-central Montana and has about 6,500 residents.
Broadwater County
Broadwater County is situated in west-central Montana and was established in 1897. It is home to around 6,200 people.
Carbon County
Located in south-central Montana, Carbon County was founded in 1895 and has a population of approximately 10,500.
Carter County
Carter County is in southeastern Montana and was established in 1917. Its population is around 1,200.
Cascade County
Established in 1887, Cascade County is situated in west-central Montana and has a population of approximately 81,000.
Chouteau County
Chouteau County is located in north-central Montana and was founded in 1865. It has around 5,500 residents.
Custer County
Custer County was founded in 1865 and is located in southeastern Montana. Its population is around 12,000.
Daniels County
Situated in northeastern Montana, Daniels County was established in 1920 and is home to about 1,600 people.
Dawson County
Dawson County is located in eastern Montana and was founded in 1864. Its population is around 9,000.
Deer Lodge County
Established in 1864, Deer Lodge County is located in southwestern Montana and has a population of approximately 9,000.
Fallon County
Fallon County is in southeastern Montana and was established in 1913. Its population is around 3,100.
Fergus County
Situated in central Montana, Fergus County was established in 1885 and has a population of approximately 11,000.
Flathead County
Founded in 1893, Flathead County is located in northwestern Montana and has a population of around 104,000.
Gallatin County
Gallatin County is located in south-central Montana and was established in 1865. It is home to around 118,000 people.
Garfield County
Garfield County is in southeastern Montana and was founded in 1919. Its population is around 1,200.
Glacier County
Located in northwestern Montana, Glacier County was established in 1919 and has approximately 14,000 residents.
Golden Valley County
Established in 1920, Golden Valley County is situated in central Montana and has a population of around 800.
Granite County
Located in west-central Montana, Granite County was founded in 1893 and has a population of approximately 3,100.
Hill County
Hill County is located in north-central Montana and was established in 1912. It has around 16,000 residents.
Jefferson County
Established in 1864, Jefferson County is situated in west-central Montana and is home to approximately 12,000 people.
Judith Basin County
Judith Basin County is located in central Montana and was established in 1920. Its population is around 2,000.
Lake County
Lake County is situated in northwestern Montana and was founded in 1923. Its population is around 31,000.
Lewis and Clark County
Established in 1864, Lewis and Clark County is located in west-central Montana and has approximately 69,000 residents.
Liberty County
Liberty County is in north-central Montana and was established in 1920. Its population is around 2,000.
Lincoln County
Located in northwestern Montana, Lincoln County was founded in 1909 and has a population of approximately 20,000.
Madison County
Madison County is situated in southwestern Montana and was established in 1864. Its population is around 8,000.
McCone County
McCone County is located in northeastern Montana and was established in 1919. It has around 1,600 residents.
Meagher County
Founded in 1867, Meagher County is located in west-central Montana and has a population of approximately 1,900.
Mineral County
Mineral County is situated in western Montana and was established in 1914. Its population is around 4,300.
Missoula County
Established in 1860, Missoula County is located in western Montana and is home to approximately 120,000 people.
Musselshell County
Musselshell County is situated in central Montana and was founded in 1911. Its population is around 4,500.
Park County
Located in south-central Montana, Park County was established in 1887 and has approximately 17,000 residents.
Petroleum County
Petroleum County is in central Montana and was founded in 1925. Its population is around 450.
Phillips County
Phillips County is located in north-central Montana and was founded in 1915. Its population is around 4,000.
Pondera County
Established in 1919, Pondera County is situated in north-central Montana and has approximately 6,000 residents.
Powder River County
Powder River County is located in southeastern Montana and was founded in 1919. It is home to around 1,600 people.
Powell County
Powell County is located in western Montana and was established in 1901. Its population is roughly 7,000.
Prairie County
Founded in 1915, Prairie County is located in southeastern Montana and has approximately 1,100 residents.
Ravalli County
Established in 1893, Ravalli County is situated in western Montana and has a population of approximately 45,000.
Richland County
Richland County is located in northeastern Montana and was established in 1914. Its population is around 11,000.
Roosevelt County
Founded in 1919, Roosevelt County is located in northeastern Montana and is home to approximately 11,000 people.
Rosebud County
Rosebud County is situated in southeastern Montana and was established in 1901. Its population is around 9,000.
Sanders County
Established in 1905, Sanders County is located in western Montana and has approximately 11,000 residents.
Sheridan County
Sheridan County is located in northeastern Montana and was established in 1913. Its population is around 3,500.
Silver Bow County
Founded in 1881, Silver Bow County is situated in southwestern Montana and has a population of approximately 35,000.
Stillwater County
Stillwater County is located in south-central Montana and was established in 1913. It is home to around 9,500 people.
Sweet Grass County
Sweet Grass County is situated in south-central Montana and was established in 1895. Its population is around 3,700.
Teton County
Founded in 1893, Teton County is located in north-central Montana and has a population of approximately 6,000.
Toole County
Toole County is located in northwestern Montana and was established in 1914. It has around 5,000 residents.
Treasure County
Treasure County is situated in south-central Montana and was established in 1919. Its population is around 700.
Valley County
Founded in 1893, Valley County is located in north-central Montana and has a population of approximately 7,500.
Wheatland County
Wheatland County is situated in central Montana and was established in 1917. Its population is around 2,000.
Wibaux County
Wibaux County is located in southeastern Montana and was founded in 1914. Its population is around 1,000.
Yellowstone County
Established in 1883, Yellowstone County is situated in south-central Montana and has approximately 162,000 residents.
Old Antique Atlases & Maps of Montana
Disclaimer: All Montana maps are free to use for your own genealogical purposes and may not be reproduced for resale or distribution.
Source: David Rumsey Historical Map Collection
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1880 Territory of Montana
Shows counties, settlements, townships, Indian reservations, railroads, rivers, etc. Prime meridians: Greenwich and Washington.
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1880 Map of Oregon, Washington, Idaho, and part of Montana
Shows settlements, railroad, rivers, etc. Prime meridians: Greenwich and Washington.
Montana Map Links
- Montana State Park Map (mapofus.org)
- Montana Lakes and Rivers Map (mapofus.org)
- Montana Map With Cities and Highways (mapofus.org)
- Montana Digital Map Library (usgwarchives.net)
- Old Historical Maps of Montana (alabamamaps.ua.edu)
- Montana Maps, Atlases & Gazetteers (ancestry.com)
- Montana Maps – The Perry-Castañeda Library Map Collection (lib.utexas.edu)
- U.S., Indexed County Land Ownership Maps, 1860-1918 (ancestry.com)
- American Memory Map Collection: 1500-2004 (memory.loc.gov)
- Montana Map Books (amazon.com)
