13 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakewood | 1 | 157,161 | 156,281 | 0.09% | 3,616 | 43 | City |
| Centennial | 2 | 109,178 | 108,202 | 0.15% | 3,620 | 30 | City |
| Littleton | 3 | 44,519 | 45,598 | -0.4% | 3,528 | 13 | City |
| Englewood | 4 | 36,046 | 33,622 | 1.13% | 5,494 | 7 | City |
| Greenwood Village | 5 | 15,111 | 15,642 | -0.58% | 1,829 | 8 | City |
| Lone Tree | 6 | 13,982 | 14,218 | -0.28% | 1,425 | 10 | City |
| Cherry Hills Village | 7 | 6,309 | 6,428 | -0.32% | 1,017 | 6 | City |
| Sheridan | 8 | 5,846 | 6,104 | -0.73% | 2,627 | 2 | City |
| Glendale | 9 | 4,397 | 4,600 | -0.77% | 7,741 | 1 | City |
| Deer Trail | 10 | 1,883 | 1,106 | 7.42% | 1,497 | 1 | Town |
| Columbine Valley | 11 | 1,773 | 1,503 | 2.6% | 1,805 | 1 | Town |
| Bow Mar | 12 | 823 | 852 | -0.6% | 1,243 | 1 | Town |
| Foxfield | 13 | 739 | 754 | -0.27% | 559 | 1 | Town |
Lakewood is the largest city in Arapahoe County, with a population of 157,161.
Foxfield is the smallest city in Arapahoe County, with a population of 739.
There are 13 cities in Arapahoe County, Colorado.