| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lakewood | 1 | 157,210 | 156,263 | 0.18% | 3,618 | 43 | City |
| Centennial | 2 | 109,178 | 107,732 | 0.48% | 3,620 | 30 | City |
| Littleton | 3 | 46,208 | 45,578 | -0.08% | 3,662 | 13 | City |
| Englewood | 4 | 35,822 | 33,633 | 1.46% | 5,460 | 7 | City |
| Greenwood Village | 5 | 15,285 | 15,632 | -0.25% | 1,850 | 8 | City |
| Lone Tree | 6 | 15,231 | 14,214 | -0.31% | 1,553 | 10 | City |
| Cherry Hills Village | 7 | 6,390 | 6,425 | 0.02% | 1,030 | 6 | City |
| Sheridan | 8 | 5,948 | 6,103 | -0.4% | 2,673 | 2 | City |
| Glendale | 9 | 4,456 | 4,601 | -0.42% | 7,845 | 1 | City |
| Deer Trail | 10 | 1,889 | 1,106 | 7.64% | 1,502 | 1 | Town |
| Columbine Valley | 11 | 1,734 | 1,502 | 2.97% | 1,766 | 1 | Town |
| Bow Mar | 12 | 829 | 852 | -0.36% | 1,252 | 1 | Town |
| Foxfield | 13 | 746 | 754 | 0% | 564 | 1 | Town |
Lakewood is the largest city in Arapahoe County, with a population of 157,210.
Foxfield is the smallest city in Arapahoe County, with a population of 746.
There are 13 cities in Arapahoe County, Colorado.