9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Chattanooga | 1 | 193,802 | 182,271 | 1.2% | 1,361 | 142 | City |
| Soddy-Daisy | 2 | 13,524 | 13,052 | 0.7% | 584 | 23 | City |
| Red Bank | 3 | 12,109 | 11,926 | 0.3% | 1,846 | 7 | City |
| Collegedale | 4 | 11,607 | 11,122 | 0.84% | 930 | 12 | City |
| Signal Mountain | 5 | 8,882 | 8,854 | 0.06% | 1,061 | 8 | Town |
| Lookout Mountain | 6 | 2,030 | 2,068 | -0.39% | 1,512 | 1 | Town |
| Walden | 7 | 1,971 | 1,984 | -0.15% | 558 | 4 | Town |
| Lakesite | 8 | 1,970 | 1,865 | 1.08% | 1,132 | 2 | City |
| Ridgeside | 9 | 443 | 447 | -0.23% | 2,621 | 0 | City |
Chattanooga is the largest city in Hamilton County, with a population of 193,802.
Ridgeside is the smallest city in Hamilton County, with a population of 443.
There are 9 cities in Hamilton County, Tennessee.