24 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakewood | 1 | 155,770 | 156,247 | -0.06% | 3,584 | 43.46 | City |
| Centennial | 2 | 106,007 | 108,196 | -0.41% | 3,515 | 30.16 | City |
| Highlands Ranch | 3 | 102,714 | 107,017 | 0.39% | 4,232 | 24.27 | CDP |
| Littleton | 4 | 43,688 | 45,595 | -0.86% | 3,462 | 12.62 | City |
| Englewood | 5 | 34,709 | 33,623 | 0.63% | 5,290 | 6.56 | City |
| Ken Caryl | 6 | 33,772 | 33,815 | 0.26% | 3,435 | 9.83 | CDP |
| Four Square Mile | 7 | 26,775 | 21,993 | 7.14% | 9,909 | 2.70 | CDP |
| Columbine | 8 | 26,355 | 25,892 | 0.53% | 3,973 | 6.63 | CDP |
| Greenwood Village | 9 | 14,909 | 15,649 | -0.98% | 1,804 | 8.26 | City |
| Lone Tree | 10 | 13,918 | 14,280 | -0.51% | 1,419 | 9.81 | City |
| Cherry Creek | 11 | 11,166 | 11,503 | 0.03% | 6,686 | 1.67 | CDP |
| Cherry Hills Village | 12 | 6,169 | 6,428 | -0.84% | 994 | 6.21 | City |
| Sheridan | 13 | 5,777 | 6,104 | -1.11% | 2,596 | 2.23 | City |
| Dove Valley | 14 | 5,651 | 4,943 | 0.5% | 1,804 | 3.13 | CDP |
| Meridian | 15 | 5,544 | 4,792 | 3.2% | 2,164 | 2.56 | CDP |
| Glendale | 16 | 4,345 | 4,599 | -1.16% | 7,650 | 0.57 | City |
| Inverness | 17 | 3,082 | 1,863 | 3.46% | 2,727 | 1.13 | CDP |
| Holly Hills | 18 | 2,871 | 2,815 | 0.81% | 4,950 | 0.58 | CDP |
| Columbine Valley | 19 | 1,793 | 1,502 | 3.34% | 1,826 | 0.98 | Town |
| Deer Trail | 20 | 1,783 | 1,108 | 8.19% | 1,417 | 1.26 | Town |
| Byers | 21 | 1,754 | 1,338 | 2.33% | 153 | 11.45 | CDP |
| Aetna Estates | 22 | 1,284 | 1,231 | 2.39% | 9,802 | 0.13 | CDP |
| Bow Mar | 23 | 803 | 852 | -1.23% | 1,213 | 0.66 | Town |
| Foxfield | 24 | 722 | 754 | -0.82% | 546 | 1.32 | Town |
Lakewood is the largest city in Arapahoe County, with a population of 155,770.
Foxfield is the smallest city in Arapahoe County.
There are 24 cities in Arapahoe County, Colorado.