Casper, Wyoming

Casper population, 2020 to 2024

Casper lost 492 residents from July 2020 to July 2024, a change of -0.8%. In the latest year it moved by +75. Among 16 Wyoming places of 5,000 or more, that growth ranks 12th; the median place changed by +0.7%. The median place of 5,000+ in Wyoming has 11,214 people, so Casper is 5.2 times that size.

Casper covers 26.75 square miles of land and 0.34 of water, for 2,199 people per square mile of land. The median Wyoming place of 5,000+ has 1,493, so Casper is denser than the typical town.

What county Casper is in

All of Casper's residents live in Natrona County, which had 80,410 residents in 2024. Casper holds 73.2% of the county's population. The shaded shape is on the map above; dots mark the eight nearest places.

ZIP codes in Casper

3 ZIP Code Tabulation Areas (ZCTAs) overlap Casper by at least 10% of the ZCTA's or the city's land: 82601, 82604, 82609. ZCTAs are Census approximations of USPS ZIP code delivery areas. The list comes from the 2020 ZCTA to place relationship file, so a city that annexed land after 2020 may reach into ZIP codes not listed here.

Where Casper is

The Census internal point of Casper is at 42.842100, -106.321300. Cheyenne, the capital, is 140.6 miles SE in a straight line. The nearest larger place is Cheyenne, WY (65,704 people), 142.1 miles away. The nearest city of 100,000 or more is Fort Collins, CO, 171.2 miles away.

Daylight in Casper

At 42.84° N, Casper gets about 15 h 21 min of daylight around the June solstice and 9 h 01 min around the December solstice, a swing of 6 h 19 min. Figures are sunrise to sunset from the SunCalc model for June 21 and December 21, 2026.

Places near Casper

The eight nearest incorporated places of 1,000+ in Wyoming, measured between internal points. The closest is Mills, 3.6 miles away, with 4,584 people.