23 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakewood | 1 | 157,014 | 156,281 | 0.09% | 3,613 | 43 | City |
| Centennial | 2 | 109,015 | 108,202 | 0.15% | 3,615 | 30 | City |
| Littleton | 3 | 44,699 | 45,598 | -0.4% | 3,542 | 13 | City |
| Englewood | 4 | 35,642 | 33,622 | 1.15% | 5,432 | 7 | City |
| Ken Caryl | 5 | 33,772 | 33,815 | 0.26% | 3,435 | 10 | CDP |
| Four Square Mile | 6 | 26,775 | 21,993 | 7.14% | 9,909 | 3 | CDP |
| Columbine | 7 | 26,355 | 25,892 | 0.53% | 3,973 | 7 | CDP |
| Greenwood Village | 8 | 15,199 | 15,642 | -0.58% | 1,839 | 8 | City |
| Lone Tree | 9 | 14,021 | 14,218 | -0.28% | 1,429 | 10 | City |
| Cherry Creek | 10 | 11,166 | 11,503 | 0.03% | 6,686 | 2 | CDP |
| Cherry Hills Village | 11 | 6,329 | 6,428 | -0.32% | 1,020 | 6 | City |
| Sheridan | 12 | 5,889 | 6,104 | -0.72% | 2,647 | 2 | City |
| Dove Valley | 13 | 5,651 | 4,943 | 0.5% | 1,804 | 3 | CDP |
| Meridian | 14 | 5,544 | 4,792 | 3.2% | 2,164 | 3 | CDP |
| Glendale | 15 | 4,431 | 4,600 | -0.76% | 7,801 | 1 | City |
| Inverness | 16 | 3,082 | 1,863 | 3.46% | 2,727 | 1 | CDP |
| Holly Hills | 17 | 2,871 | 2,815 | 0.81% | 4,950 | 1 | CDP |
| Byers | 18 | 1,754 | 1,338 | 2.33% | 153 | 11 | CDP |
| Deer Trail | 19 | 1,753 | 1,106 | 7.94% | 1,393 | 1 | Town |
| Columbine Valley | 20 | 1,728 | 1,503 | 2.67% | 1,760 | 1 | Town |
| Aetna Estates | 21 | 1,284 | 1,231 | 2.39% | 9,802 | 0 | CDP |
| Bow Mar | 22 | 828 | 852 | -0.6% | 1,251 | 1 | Town |
| Foxfield | 23 | 741 | 754 | -0.4% | 560 | 1 | Town |
Lakewood is the largest city in Arapahoe County, with a population of 157,014.
Foxfield is the smallest city in Arapahoe County, with a population of 741.
There are 23 cities in Arapahoe County, Colorado.