This is a list of the county seats of the U.S. State of Colorado and its two predecessors: the extralegal Territory of Jefferson and the official Territory of Colorado.
On August 24, 1859, voters of the Pike's Peak mining region approved the formation of the Provisional Government of the Territory of Jefferson and designated Denver City as the capital. [1] On November 28, 1859, the territory established 12 counties which served as the de facto local government. [2] The extralegal territory was unable to secure authorization from the United States Congress embroiled in the debate over slavery. On November 13, 1860, the territory moved its capital to Golden City. On February 28, 1861, after seven slave states seceded from the Union, U.S. President James Buchanan signed An Act to provide a temporary Government for the Territory of Colorado. [3] On June 6, 1861, the Jefferson Territory officially yielded to the new Territory of Colorado.
The 64 counties of the U.S. State of Colorado. |
The free Territory of Colorado was officially organized on February 28, 1861. [3] On November 1, 1861, the Colorado Territory created 17 original counties: Arapahoe, Boulder, Clear Creek, Costilla, Douglas, El Paso, Fremont, Gilpin, Guadalupe, Huerfano, Jefferson, Lake, Larimer, Park, Pueblo, Summit, and Weld; plus the Cheyenne and Arapaho Reserve. [4] [5] The Colorado Territory later added 12 more counties for a total of 29, of which 26 still exist. [4] [5]
On August 1, 1876, U.S. President Ulysses S. Grant issued Proclamation 230: Admission of Colorado into the Union. [6] The State of Colorado has created 41 counties of which 38 still exist, for a total of 64 existing counties. [4] [5]
Current county seat |
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Historic county seat |
State capital † |
Territorial capital ‡ |
Extinct county * |
Adams County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 519,572. The county seat is Brighton, and the largest city is Thornton. The county is named for Alva Adams, an early Governor of the State of Colorado in 1887–1889. Adams County is part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area.
Bent County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 5,650. The county seat and only incorporated municipality is Las Animas. The county is named in honor of frontier trader William Bent.
Arapahoe County is a county located in the U.S. state of Colorado. As of the 2020 census, its population was 655,070, making it the third-most populous county in Colorado. The county seat is Littleton, and the most populous city is Aurora. The county was named for the Arapaho Native American tribe, who once lived in the region.
The Provisional Government of the Territory of Jefferson was an extralegal and unrecognized United States territory that existed in the Pike's Peak mining region from October 24, 1859, until it yielded to the new Territory of Colorado on June 6, 1861. The Jefferson Territory, named for Founding Father and third United States president Thomas Jefferson, included land officially part of the Kansas Territory, the Nebraska Territory, the New Mexico Territory, the Utah Territory, and the Washington Territory, but the region was remote from the governments of those five territories.
Jefferson County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. Its territory covered a broad swath surrounding the region of the Pike's Peak Gold Rush, and was a functioning democratically elected government until the organization of the Territory of Colorado in 1861. At that time, the successor Jefferson County was permanently created, taking its name from its predecessor and incorporating the heart of its territory.
Arapahoe County was a county of Kansas Territory in the United States that existed from August 25, 1855, until Kansas's admission into the Union on January 29, 1861.
Arapahoe County was a county of the extralegal United States Territory of Jefferson that existed from November 28, 1859, until February 28, 1861. The county name was also spelled Arapaho County, Arapahoe County, Arrapahoe County, and Arappahoe County. The county seat was Denver City.
The following outline is provided as an overview of and topical guide to the U.S. state of Colorado:
The 1876 Colorado gubernatorial election took place on October 3, 1876, to elect the 1st Governor of Colorado after the state was admitted to the union on August 1, 1876. Republican John Long Routt, last governor of the Colorado Territory, was elected in a close race against Democratic nominee Bela M. Hughes.