Colorado

Genealogy Trails


COUNTY LINKS AND FORMATION INFORMATION
 

 

Adams County
formed in 1902 from part of Arapahoe county.

Alamosa County
formed in 1913 from parts of Conejos and Costilla counties.

Arapahoe County
one of the original 17 counties, the first to be incorporated.

Archuleta County
formed in 1885 from part of Conejos county.

Baca County
formed in 1889 from part of Las Animas county.

Bent County
formed in 1874 from part of Greenwood county.

Boulder County
one of the original 17 counties.

Broomfield County
Host: Julie Schadek 
formed in 2001 from parts of Adams, Boulder, Jefferson and Weld counties.

Chaffee County
formed in 1879 from part of Lake county.

Cheyenne County
formed in 1889 from parts of Bent and Elbert counties.

Clear Creek County
one of the original 17 counties.

Conejos County
one of the original 17 counties. Originally also known as Guadalupe county

Costilla County
one of the original 17 counties.

Crowley County
formed in 1911 from part of Otero county.

Custer County
formed in 1877 from part of Fremont county.

Delta County
formed in 1883 from part of Gunnison county.

Denver County
Host: Julie Schadek
formed in 1902 from part of Arapahoe county.

Dolores County
formed in 1881 from part of San Juan county.

Douglas County
one of the original 17 counties.

Eagle County
formed in 1883 from part of Summit county.

El Paso County
one of the original 17 counties.

Elbert County
formed in 1874 from parts of Douglas and Greenwood counties.

Fremont County
Host: Courtney Birkes
one of the original 17 counties.

Garfield County
formed in 1883 from part of Summit county.

Gilpin County
Hosts: Dennis & Cathy Danielson
one of the original 17 counties.

Grand County
formed in 1874 from part of Summit county.

Gunnison County
formed in 1877 from part of Lake county.

Hinsdale County
formed in 1874 from parts of Conejos and Lake counties.

Huerfano County
one of the original 17 counties.

Jackson County
formed in 1909 from part of Larimer county.

Jefferson County
Host: Julie Schadek 
one of the original 17 counties.

Kiowa County
formed in 1889 from part of Bent county.

Kit Carson County
formed in 1889 from part of Elbert county.

Lake County
one of the original 17 counties.

La Plata County
formed in 1874 from parts of Conejos and Lake counties.

Larimer County
one of the original 17 counties.

Las Animas County
formed in 1866 from part of Huerfano county.

Lincoln County
formed in 1889 from parts of Bent and Elbert counties.

Logan County
formed in 1887 from part of Weld county.

Mesa County
formed in 1883 from part of Gunnison county.

Mineral County
formed in 1893 from parts of Hindsdale and Rio Grande counties.

Moffat County
formed in 1911 from part of Routt county.

Montezuma County
formed in 1889 from part of La Plata county.

Montrose County
formed in 1883 from part of Gunnison county.

Morgan County
formed in 1889 from part of Weld county.

Otero County
formed in 1889 from part of Bent county.

Ouray County
formed in 1877 from parts of Lake and San Juan counties.

Park County
one of the original 17 counties.

Phillips County
formed in 1889 from part of Logan county.

Pitkin County
formed in 1881 from part of Gunnison county

Prowers County
formed in 1889 from part of Bent county.

Pueblo County
one of the original 17 counties.

Rio Blanco County
formed in 1889 from part of Garfield county.

Rio Grande County
formed in 1874 from parts of Conejos and Costilla counties.

Routt County
formed in 1877 from part of Grand county.

Saguache County
formed in 1866 from parts of Costilla and Lake counties.

San Juan County
formed in 1876 from part of Lake county.

San Miguel County
formed in 1883 from part of Ouray county.

Sedgwick County
formed in 1889 from part of Logan county.

Summit County
one of the original 17 counties.

 Teller County
formed in 1899 from part of El Paso county.

Washington County
formed in 1887 from part of Weld county.

Weld County
one of the original 17 counties.

Yuma County
formed in 1889 from part of Washington county.

 

 


 


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