Colorado vs Wyoming

The two states, county by county

Both maps share one density scale, so the same shade means the same number of people per square mile on either side of the border. Darker counties are denser. Select a county to open its page.

Side by side

Population and density

Colorado has 5,957,493 residents, 10.1 times Wyoming's 587,618. Colorado ranks 21st and Wyoming 51st of the 50 states and DC. Colorado is the more crowded, with 57.5 people per square mile against 6.1, 9.5 times.

Land area

Colorado has 103,637 square miles of land, 7% more than Wyoming's 97,089. The largest county-equivalent in Colorado is Las Animas County at 4,773 square miles; in Wyoming it is Sweetwater County at 10,427.

Counties

Colorado is divided into 64 county-equivalents and Wyoming into 23, so an average Colorado county covers 1,619 square miles against 4,221. The typical county in Colorado has 15,336 residents, against 14,250 in Wyoming. The most populous are El Paso County (752,772) and Laramie County (101,783).

3 county names appear on both sides of the border: Fremont, Lincoln, Park. Use the FIPS code, not the name, when joining data across the two states.

Household income

The median county in Colorado has a household income of $72,982, 4% above Wyoming's $70,330. The highest county incomes are Douglas County ($144,807) in Colorado and Teton County ($130,156) in Wyoming, from SAIPE 2023.

Capitals and daylight

Denver and Cheyenne are 97 miles apart in a straight line; from Denver the initial bearing is 5°, N. On June 21, 2026, Denver gets 14 h 59 min of daylight and Cheyenne 15 h 09 min; on December 21 the figures are 9 h 21 min and 9 h 13 min. Month by month tables are on the Denver and Cheyenne daylight pages.

Where they sit

Both are in the Census Mountain division of the West region. By county internal points, Colorado spans 2 UTM zones and Wyoming 2.