Founded on 1861-11-01, Arapahoe County is one of 64 counties in the state of Colorado. The city of Littleton is the county seat. With FIPS code of 5, Arapahoe County has a population of 654,900 and area of 804.41 square miles (2,083 km2).
List of all cities in Arapahoe County, CO alphabetically
| City/Town | Postal Code | Area Code |
| Arapahoe County Offices, CO | 80166 | 303/720 |
| Aurora, CO | 80010 | 303/720 |
| 80012 | 303/720 | |
| 80013 | 303/720 | |
| 80014 | 303/720 | |
| 80015 | 303/720 | |
| 80016 | 303/720 | |
| 80017 | 303/720 | |
| 80018 | 303/720 | |
| 80041 | 303/720 | |
| 80044 | 303/720 | |
| 80046 | 303/720 | |
| 80047 | 303/720 | |
| 80247 | 303/720 | |
| Byers, CO | 80103 | 303/720 |
| Centennial, CO | 80014 | 303/720 |
| 80015 | 303/720 | |
| 80016 | 303/720 | |
| 80111 | 303/720 | |
| 80112 | 303/720 | |
| 80121 | 303/720 | |
| 80122 | 303/720 | |
| 80161 | 303/720 | |
| Cherry Hills, CO | 80110 | 303/720 |
| 80111 | 303/720 | |
| 80113 | 303/720 | |
| 80121 | 303/720 | |
| Deer Trail, CO | 80105 | 303/720 |
| Denver, CO | 80012 | 303/720 |
| 80014 | 303/720 | |
| 80247 | 303/720 | |
| Englewood, CO | 80110 | 303/720 |
| 80111 | 303/720 | |
| 80112 | 303/720 | |
| 80113 | 303/720 | |
| 80150 | 303/720 | |
| 80151 | 303/720 | |
| 80155 | 303/720 | |
| Foxfield, CO | 80016 | 303/720 |
| Grants Ranch, CO | 80121 | 303/720 |
| Greenwood Village, CO | 80110 | 303/720 |
| 80111 | 303/720 | |
| 80112 | 303/720 | |
| 80121 | 303/720 | |
| 80150 | 303/720 | |
| 80155 | 303/720 | |
| Littleton, CO | 80120 | 303/720 |
| 80121 | 303/720 | |
| 80122 | 303/720 | |
| 80160 | 303/720 | |
| 80161 | 303/720 | |
| 80165 | 303/720 | |
| 80166 | 303/720 | |
| Littleton City Offices, CO | 80165 | 303/720 |
| Lone Tree, CO | 80112 | 303/720 |
| Sheridan, CO | 80110 | 303/720 |
Map of Cities in Arapahoe County, CO
