Colorado vs Oklahoma

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, 45% more than Oklahoma's 4,095,393. Colorado ranks 21st and Oklahoma 28th of the 50 states and DC. Both average about 60 people per square mile.

Land area

Colorado has 103,637 square miles of land, 51% more than Oklahoma's 68,597. The largest county-equivalent in Colorado is Las Animas County at 4,773 square miles; in Oklahoma it is Osage County at 2,247.

Counties

Oklahoma is divided into 77 county-equivalents and Colorado into 64, so an average Oklahoma county covers 891 square miles against 1,619. The typical county in Colorado has 15,336 residents, against 20,577 in Oklahoma. The most populous are El Paso County (752,772) and Oklahoma County (816,490).

8 county names appear on both sides of the border: Custer, Garfield, Jackson, Jefferson, Kiowa, Lincoln, Logan, Washington. 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, 30% above Oklahoma's $56,166. The highest county incomes are Douglas County ($144,807) in Colorado and Canadian County ($86,539) in Oklahoma, from SAIPE 2023.

Capitals and daylight

Denver and Oklahoma City are 503 miles apart in a straight line; from Denver the initial bearing is 123°, ESE. On June 21, 2026, Denver gets 14 h 59 min of daylight and Oklahoma City 14 h 34 min; on December 21 the figures are 9 h 21 min and 9 h 45 min. Month by month tables are on the Denver and Oklahoma City daylight pages.

Where they sit

The border between them is also a Census region boundary: Colorado is in the West and Oklahoma in the South. By county internal points, Colorado spans 2 UTM zones and Oklahoma 3.