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There were 17 origiinal counties created on 1 November 1861. They include:

Arapahoe.

Boulder.

Clear Creek.

Conejos.

Costilla.

Douglas.

El Paso.

Freemont.

Gilpin.

Huerfano.

Jefferson.

Lake.

Larimer.

Park.

Pueblo.

Summt.

Weld.

Twelve earliier counties were established as a part of the creation of the extralegal Territory of Jefferson.

There were no counties in what is now Colorado when it was a part of the Diistrict of Louisiana, the Territory of Miiissouri or the Territory of Nebraska.

Conejos County was originally named Guadalupe County but for only six days.

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13y ago

Colorado is a US State and contains no new, old, or other states of any kind.

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