| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chattanooga | 1 | 196,582 | 182,255 | 1.26% | 1,381 | 142 | City |
| Soddy-Daisy | 2 | 13,576 | 13,054 | 0.76% | 586 | 23 | City |
| Red Bank | 3 | 12,450 | 11,926 | 0.36% | 1,898 | 7 | City |
| Collegedale | 4 | 11,601 | 11,124 | 0.89% | 930 | 12 | City |
| Signal Mountain | 5 | 8,836 | 8,851 | 0.14% | 1,056 | 8 | Town |
| Lookout Mountain | 6 | 2,043 | 2,068 | -0.05% | 1,521 | 1 | Town |
| Lakesite | 7 | 2,003 | 1,901 | 1.16% | 1,151 | 2 | City |
| Walden | 8 | 1,963 | 1,984 | -0.1% | 556 | 4 | Town |
| Ridgeside | 9 | 440 | 447 | -0.23% | 2,604 | 0 | City |
Chattanooga is the largest city in Hamilton County, with a population of 196,582.
Ridgeside is the smallest city in Hamilton County, with a population of 440.
There are 9 cities in Hamilton County, Tennessee.