List of counties in Colorado



This is a list of the 64 of the  . The counties of Colorado are important components of government since the has no secondary civil subdivisions such as s.  Two counties, the  and the, have.

Colorado counties
The FIPS county code is the five-digit Federal Information Processing Standard (FIPS) code which uniquely identifies counties and county equivalents in the United States. The three-digit number is unique to each individual county within a state, but to be unique within the entire United States, it must be prefixed by the state code. This means that, for example, while, is 001, ,  and ,  are also 001. To uniquely identify Adams County, Colorado, one must use the state code of 08 plus the county code of 001; therefore, the unique nationwide identifier for Adams County, Colorado is 08001. The links in the column are to the Census Bureau Info page for that county.

Historic counties
The sortable table below lists all the historic of the, the , the , and the extralegal  that previously existed within the boundaries of the present , as well as the three defunct counties of the  and the three defunct counties of the. The table includes the following information:
 * The official name of the county,
 * The territory or state,
 * The date the county was created,
 * The date the county was abolished or excluded from the, and
 * Historical notes.

No organized counties of the, the , or the existed within the present boundaries of the.

Colorado county minutiae

 * is the home of the most ancient known in the  region.  The  includes artifacts more than 13,000 years old.
 * was the first area within the present State of Colorado to be settled by Europeans in.
 * , created by the in, was the first organized county to extend into the area of the present State of Colorado.
 * , created by the in, was the first county created exclusively within the area of the present State of Colorado.
 * Of the 17 original counties created by the in, only  and  have retained their original boundaries.
 * was the first Colorado county to be renamed in.
 * was the first Colorado county to be created (in ) after the original 17 counties.
 * was the longest lived former Colorado county, existing four years from to.
 * was the shortest lived former Colorado county, existing only two days in before being dissolved.
 * The is the most recently created Colorado county.
 * is the most extensive Colorado county.
 * The is the least extensive Colorado county.
 * is the most populous Colorado county.
 * is the least populous Colorado county.
 * The is the most densely populated Colorado county.
 * is the least densely populated Colorado county.
 * has the highest point in Colorado at the summit of at 4401.2 m elevation (the highest point in the entire .)
 * has the lowest point in Colorado where the flows into  at 1010 m elevation (the highest low point of any .)
 * The following twelve Colorado counties have a county seat with the same name as the county:
 * Of all 64 Colorado counties, only has a county seat that is not an incorporated municipality.
 * The name of each of the following two Colorado counties forms one part of the name of its county seat:
 * has the most incorporated municipalities of any Colorado county with 31.
 * The following nine Colorado counties have no incorporated municipalities other than the county seat:
 * The and the  are the only two Colorado counties with s.
 * ,, and are the only three dismembered Colorado counties with s.
 * and the each border only three counties.
 * borders ten counties.