16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Killeen | 1 | 163,581 | 153,735 | 1.22% | 2,994 | 54.63 | City |
| Temple | 2 | 100,057 | 82,652 | 3.6% | 1,372 | 72.94 | City |
| Harker Heights | 3 | 35,250 | 33,242 | 1.15% | 2,256 | 15.62 | City |
| Belton | 4 | 26,526 | 23,138 | 2.62% | 1,311 | 20.23 | City |
| Fort Hood | 5 | 24,448 | 23,302 | -1.38% | 1,263 | 19.36 | CDP |
| Nolanville | 6 | 7,696 | 5,981 | 4.66% | 1,576 | 4.88 | City |
| Morgan's Point Resort | 7 | 4,845 | 4,660 | 0.77% | 1,605 | 3.02 | City |
| Troy | 8 | 3,674 | 2,411 | 7.4% | 789 | 4.65 | City |
| Salado | 9 | 2,391 | 2,398 | -0.04% | 771 | 3.10 | Village |
| Little River-Academy | 10 | 1,980 | 1,990 | -0.1% | 1,036 | 1.91 | City |
| Bartlett | 11 | 1,606 | 1,631 | -0.31% | 1,298 | 1.24 | City |
| Holland | 12 | 1,151 | 1,080 | 1.23% | 700 | 1.65 | Town |
| Rogers | 13 | 1,102 | 1,109 | -0.09% | 1,068 | 1.03 | Town |
| Pendleton | 14 | 834 | 729 | 7.2% | 187 | 4.47 | CDP |
| South Mountain | 15 | 411 | 406 | 0.24% | 255 | 1.61 | Town |
| Ben Arnold | 16 | 116 | 92 | 7.41% | 19 | 6.01 | CDP |
Killeen is the largest city in Bell County, with a population of 163,581.
Ben Arnold is the smallest city in Bell County.
There are 16 cities in Bell County, Texas.