List of counties in Colorado

Columns: County | Territory or State | Created | Superseded | History
Arapahoe County | Territory of Kansas | 18550825 1855-08-25 | 18610129 1861-01-29 | Created in 1855 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861 | Beaver County | Territory of Utah | 18560105 1856-01-05 | 18610228 1861-02-28 | Split from Iron and Millard counties in 1856 . Excluded from the new Territory of Colorado in 1861 | Broderick County | Territory of Kansas | 18590207 1859-02-07 | 18610129 1861-01-29 | Split from Arapahoe County in 1859 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861 | El Paso County | Territory of Kansas | 18590207 1859-02-07 | 18610129 1861-01-29 | Split from Arapahoe County in 1859 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861 | Fremont County | Territory of Kansas | 18590207 1859-02-07 | 18610129 1861-01-29 | Split from Arapahoe County in 1859 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861 | Montana County | Territory of Kansas | 18590207 1859-02-07 | 18610129 1861-01-29 | Split from Arapahoe County in 1859 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861 | Oro County | Territory of Kansas | 18590207 1859-02-07 | 18610129 1861-01-29 | Split from Arapahoe County in 1859 , but never organized . Reverted to unorganized territory when Kansas joined the Union in 1861

Example questions:
In which territory or state is the former county that was created in 1852 and organized in 1856 ? | In which territory or state is the former county that had the population of 32,937 in 2010 ? | In which territory or state is the former county that was named after a California senator ? | In which territory or state is the former county that the most populous county in its territory or state ?

Answers:
Territory of Utah | Territory of New Mexico | Territory of Kansas | Territory of Utah