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Arapahoe County, Kansas Territory

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Title: Arapahoe County, Kansas Territory  
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Subject: Timeline of Colorado history, Adams County, Colorado, List of counties in Colorado, South Arapahoe County, Colorado, Arrappahoe County, Jefferson Territory
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Arapahoe County, Kansas 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.


On August 25, 1855, the Kansas Territorial Legislature created Arapahoe County to govern the western portion of Kansas Territory (in what is now Colorado). The county was named for the Arapaho Nation of Native Americans that lived in the region.

In July 1858, gold was discovered along the Territory of Jefferson on October 24, 1859.

Following the Republican Party election victories in 1860, the United States Congress admitted Kansas to the Union on January 29, 1861.[1] The Kansas Act of Admission excluded the portion of the Kansas Territory west of the 25th meridian west from Washington from the new state, and Arapahoe County and the rest of this region reverted to unorganized territory.

On February 28, 1861, Arapahoe County.

Another Arapahoe County existed in southwestern Kansas around 1880, when its population was included in the Federal census of that year, but it was never organized. It became defunct in 1883 and its former area was established in 1887 as Haskell County, Kansas.

See also

1855 first edition of Colton's map of Nebraska and Kansas Territories


  1. ^ "An Act for the Admission of Kansas into the Union" ( 
  2. ^ "An Act to provide a temporary Government for the Territory of Colorado" ( 

External links

  • Colorado County Evolution by Don Stanwyck
  • Kansas State Historical Society website
  • Colorado State Historical Society website

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