Las Animas County at 4,775 square miles.
Las Animas County is the largest county in the state of Colorado. 4,775 square miles (12,368 km²)
In terms of population the 4 largest counties in Colorado are:El Paso - 622,263Denver - 600,158Arapahoe - 572,003Jefferson - 534,543In terms square miles it is:Las Animas - 4,773Moffat - 4,743Weld - 3,987Mesa - 3,329
The largest is Berkeley County with 1,228 square miles.
The largest is Nye County with 18,147 square miles.
Las Animas County at 4,773.27 square miles. Almost four Rhode Islands can be fitted into Las Animas County.
Las Animas County: 4,773.27 square miles.
4,775 square miles
It is Ware County with 903 square miles.
Shelby County with 755 square miles.
Worcester County with 1,513 square miles.
Keweenaw County - 5,966 square miles.
Brewster County is the largest county in Texas at 6,193 square miles.