Area Code Profile
303, CO
Browse ZIP codes and key stats for 303, Colorado: population, households, income, education, health coverage, and more.
Area Code details
Local time 23:40:28(MT)| Location | 303, CO |
|---|---|
| Population (ZIP areas) | 3,382,602(sum of local ZIP code populations) |
| Total ZIP codes | 153total |
| ZIP codes (by type) | 133 Standard18 PO Box2 Unique |
| Overlay codes | |
| Cities Covered | |
| Counties Covered |
Map of area code 303
ZIP codes in area code 303
153 ZIP codes covered by this area code.
Cities served by area code 303
68 cities covered by this area code.
| City | ZIP codes | Median incomeHousehold | Population |
|---|---|---|---|
| Denver | 64 | $94,718 | 715,522 |
| Aurora | 17 | $88,368 | 386,261 |
| Thornton | 1 | $103,088 | 141,867 |
| Arvada | 7 | $117,348 | 124,402 |
| Westminster | 4 | $100,272 | 116,317 |
| Boulder | 11 | $87,493 | 108,250 |
| Longmont | 4 | $90,671 | 98,885 |
| Broomfield | 4 | $123,874 | 74,112 |
| Castle Rock | 3 | $145,197 | 73,158 |
| Commerce City | 2 | $111,972 | 62,418 |
| Parker | 2 | $133,369 | 58,512 |
| Littleton | 16 | $98,839 | 45,652 |
| Brighton | 3 | $107,679 | 40,083 |
| Englewood | 7 | $86,800 | 33,659 |
| Wheat Ridge | 2 | $90,564 | 32,398 |
| Lafayette | 1 | $119,040 | 30,411 |
| Erie | 1 | $173,349 | 30,038 |
| Louisville | 1 | $147,319 | 21,226 |
| Golden | 4 | $98,582 | 20,399 |
| Firestone | 1 | $120,150 | 16,381 |
| Frederick | 1 | $129,460 | 14,513 |
| Lone Tree | 1 | $123,741 | 14,253 |
| Henderson | 1 | — | 13,106 |
| Evergreen | 2 | $150,417 | 9,307 |
| Conifer | 1 | — | 8,209 |
| Bailey | 1 | — | 8,179 |
| Fort Lupton | 1 | $80,889 | 7,955 |
| Dacono | 1 | $104,559 | 6,297 |
| Niwot | 1 | $146,492 | 4,306 |
| Pine | 1 | — | 3,684 |
| Strasburg | 1 | $117,845 | 3,307 |
| Bennett | 1 | $107,736 | 2,862 |
| Lyons | 1 | $122,837 | 2,209 |
| Idaho Springs | 1 | $89,436 | 1,782 |
| Elizabeth | 1 | $112,986 | 1,675 |
| Hudson | 1 | $81,250 | 1,651 |
| Indian Hills | 1 | $178,980 | 1,474 |
| Nederland | 1 | $122,917 | 1,471 |
| Byers | 1 | $93,571 | 1,322 |
| Kittredge | 1 | $222,500 | 1,308 |
| Keenesburg | 1 | $83,950 | 1,250 |
| Georgetown | 1 | $79,118 | 1,118 |
| Deer Trail | 1 | $73,906 | 1,068 |
| Central City | 1 | $61,622 | 1,051 |
| Kiowa | 1 | $92,625 | 725 |
| Watkins | 1 | $158,173 | 682 |
| Allenspark | 1 | $108,056 | 568 |
| Roggen | 1 | — | 563 |
| Eldorado Springs | 1 | $133,008 | 559 |
| Dumont | 1 | — | 541 |
| Franktown | 1 | $250,001 | 409 |
| Morrison | 1 | $122,083 | 396 |
| Empire | 1 | $66,797 | 345 |
| Louviers | 1 | $145,380 | 293 |
| Buffalo Creek | 1 | — | 273 |
| Jamestown | 1 | $149,375 | 256 |
| Idledale | 1 | — | 244 |
| Shawnee | 1 | — | 230 |
| Silver Plume | 1 | $52,083 | 207 |
| Larkspur | 1 | $70,417 | 206 |
| Grant | 1 | — | 204 |
| Rollinsville | 1 | — | 194 |
| Elbert | 1 | $69,167 | 188 |
| Sedalia | 1 | — | 177 |
| Dupont | 1 | — | 170 |
| Ward | 1 | $56,875 | 128 |
| Black Hawk | 1 | $116,806 | 127 |
| Pinecliffe | 1 | — | 37 |
Counties served by area code 303
12 counties covered by this area code.
| County | ZIP codes | Median incomeHousehold | Population |
|---|---|---|---|
| Denver County | 64 | $94,718 | 715,522 |
| Arapahoe County | 44 | $101,087 | 655,070 |
| Jefferson County | 22 | $110,656 | 582,910 |
| Adams County | 14 | $94,571 | 519,572 |
| Douglas County | 10 | $149,594 | 357,978 |
| Boulder County | 25 | $103,994 | 330,758 |
| Weld County | 39 | $97,097 | 328,981 |
| Broomfield County | 4 | $123,874 | 74,112 |
| Elbert County | 6 | $132,685 | 26,062 |
| Park County | 10 | $103,670 | 17,390 |
| Clear Creek County | 5 | $94,577 | 9,397 |
| Gilpin County | 3 | $95,361 | 5,808 |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS