Weld County, Colorado ZIP Codes

35 ZIP Codes

Zip Code
City
Population
80634Greeley65,622
80504Longmont63,451
80631Greeley53,722
80550Windsor46,456
80516Erie39,048
80620Evans20,798
80534Johnstown20,502
80621Fort Lupton15,060
80543Milliken9,774
80615Eaton9,060
80514Dacono6,721
80530Frederick6,242
80542Mead5,155
80643Keenesburg5,119
80645La Salle4,917
80651Platteville4,837
80642Hudson4,466
80610Ault4,132
80650Pierce2,192
80644Kersey2,124
80520Firestone1,140
80623Gilcrest1,026
80648Nunn902
80624Gill685
80611Briggsdale557
80612Carr494
80729Grover350
80652Roggen299
80622Galeton282
80546Severance271
80649Orchard263
80742New Raymer204
80754Stoneham141
80732Hereford42
80646Lucerne0

Overview of ZIP Codes in Weld County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
35
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 35 ZCTAs in Weld County, Colorado (US Census).