Las Animas County.
Denver
Colorado's largest county is the city and county of Denver (which is also the largest city in the state) and the 2009 population was 610, 345
Las Animas County is the largest county in the state of Colorado. 4,775 square miles (12,368 km²)
Las Animas County.
Denver: 598,707 Colorado Spring: 360,890 Aurora: 276,393
The largest county and city in both size and population is Denver
The Denver County (and also the city)
Colorado is the 8th largest state in terms of square miles.
Mesa Verde is located in Montezuma County, Colorado, United States. It is the largest archaeological preserve in the country.
It is Broomfield county. is not but Sedgwick, County may be at 548 Sq. Miles
Arapahoe County, Colorado is the most populated county in the state of Colorado. Arapahoe County, Colorado has a population of 595,546 and was founded November 1, 1861.
Las Aniimas County has the largest area and the City and County of Denver has the greatest population.
Colorado is the 8th largest US State.