Montana County Creation Dates and Parent CountiesEdit This Page

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Name of County Date Formed Parent County Progeny County
Beaverhead 02 Feb 1865 Montana Territory none
Big Horn 13 Jan 1913 Rosebud, Yellowstone Tresaure 1919
Blaine 29 Feb 1912 Chouteau, Hill none
Broadwater 09 Feb 1897 Jefferson, Meagher none
Carbon 04 Mar 1895 Park, Yellowstone none
Carter 22 Feb 1917 Custer Powder River 1919
Cascade 12 Sep 1887 Chouteau, Meagher Judith Basin 1920
Chouteau 02 Feb 1865 Montana Territory Blaine 1912, Cascasde 1887, Hill 1912, Liberty 1920, Pondera 1919, Teton 1893
Custer 02 Feb 1865 Montana Territory Carter 1917, Fallon 1913, Prairie 1915, Sheridan 1913, Yellowstone 1883
Daniels 30 Aug 1920 Valley, Sheridan none
Dawson 15 Jan 1869 Montana Territory McCone 1919, Richland 1914, Rosebud 1901, Valley 1893, Wibaux 1914
Deer Lodge 02 Feb 1865 Montana Territory Granite 1893, Silver Bow 1881
Edgerton 02 Feb 1865 Montana Territory renamed Lewis and Clark 1867
Fallon 09 Dec 1913 Custer none
Fergus 12 Mar 1885 Meagher Judith Basin 1920, Musselshell 1911, Petroleum 1924
Flathead 06 Feb 1893 Missoula Lake 1923, Lincoln 1909
Gallatin 02 Feb 1865 Montana Territory Park 1887, Yellowstone 1883
Garfield 07 Feb 1919 Valley, McCone Petroleum 1924
Glacier 17 Feb 1919 Teton none
Golden Valley 04 Oct 1920 Musselshell none
Granite 02 Mar 1893 Deer Lodge none
Hill 28 Feb 1912 Chouteau Blaine 1912, Liberty 1920
Jefferson 02 Feb 1865 Montana Territory Broadwater 1897
Judith Basin 10 Dec 1920 Ferguson, Cascade none
Lake 11 May 1923 Flathead, Missoula none
Lewis and Clark 20 Dec 1867 renamed from Edgerton none
Liberty 11 Feb 1920 Chouteau, Hill none
Lincoln 09 Mar 1909 Flathead none
Madison 02 Feb 1865 Montana Territory none
McCone 20 Feb1919 Dawson, Richland Garfield 1919
Meagher 16 Nov 1867 Montana Territory Broadwater 1897, Cascade 1887, Fergus 1885, Sweet Grass 1895, Wheatland 1917, Yellowstone 1883
Mineral 07 Aug 1914 Missoula none
Missoula 02 Feb 1865 Montana Territory Flathead 1893, Lake 1923, Mineral 1914, Powell 1901, Ravalli 1893, Sanders 1905
Musselshell 11 Feb 1911 Fergus, Yellowstone Golden Valley 1920
Park 23 Feb 1887 Gallatin Carbon 1895, Sweet Grass 1895
Petroleum 24 Nov 1924 Fergus, Garfield none
Phillips 05 Feb 1915 Valley none
Pondera 17 Feb 1919 Chouteau none
Powder River 07 Mar 1919 Custer none
Powell 31 Jan 1901 Missoula none
Prairie 05 Feb 1915 Custer none
Ravalli 16 Feb 1893 Missoula none
Richland 27 May 1914 Dawson McCone 1919, Roosevelt 1919
Roosevelt 18 Feb 1919 Valley, Richland none
Rosebud 11 Feb 1901 Dawson Big Horn 1913
Sanders 07 Feb 1905 Missoula none
Sheridan 24 Mar 1913 Custer Daniels 1920
Silver Bow 16 Feb 1881 Deer Lodge none
Stillwater 24 Mar 1913 Sweet Grass, Yellowstone none
Teton 07 Feb 1893 Chouteau Glacier 1919, Toole 1914
Toole 07 May 1914 Teton none
Treasure 07 Feb 1919 Big Horn none
Valley 06 Feb 1893 Dawson Daniels 1920, Garfield 1919, Phillips 1915, Roosevelt 1919
Wheatland 22 Feb 1917 Meagher, Sweet Grass none
Wibaux 17 Aug 1914 Dawson none
Yellowstone 26 Feb 1883 Gallatin, Meagher, Custer Rosebud 1913, Carbon 1895, Sweet Grass 1895, Musselshell 1911, Stillwater 1913

 

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  • This page was last modified on 13 March 2009, at 04:30.
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