Find the last 4 digits (ZIP+4) for an address in 82604

ZIP 82604, Casper, WY is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 82604 – Casper, WY

Casper, Wyoming · Natrona County · Mountain time

ZIP code82604
CityCasper
StateWyoming
CountyNatrona County
Area code307
Population27,487
Time zoneMountain · local time
ZIP typeStandard (has a Census ZCTA area)
Land area1,048.36 sq mi
Center (lat, long)42.9149, -106.7073

Map

Nearby ZIP codes

82646 Natrona · 5.3 mi82648 Powder River · 16.5 mi82644 Mills · 17.6 mi82602 Casper · 17.8 mi82605 Casper · 20.2 mi82601 Casper · 21.4 mi82609 Casper · 28.1 mi82636 Evansville · 28.4 mi

About ZIP 82604

ZIP code 82604 is assigned to Casper, Wyoming. It lies in Natrona County. Its Census area covers about 1,048.36 square miles of land. The closest neighboring ZIP is 82646 (Natrona), about 5.3 miles away.

Every address in 82604 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources