19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mont Belvieu | 1 | 10,820 | 7,724 | 5.78% | 608 | 18 | City |
| Mont Belvieu | 2 | 10,820 | 7,865 | 5.78% | 608 | 18 | City |
| Beach City | 3 | 3,510 | 3,231 | 1.56% | 784 | 4 | City |
| Beach City | 4 | 3,510 | 3,237 | 1.56% | 784 | 4 | City |
| Winnie | 5 | 2,206 | 2,677 | -3.08% | 558 | 4 | CDP |
| Anahuac | 6 | 2,036 | 1,973 | 0.64% | 982 | 2 | City |
| Anahuac | 7 | 2,036 | 1,969 | 0.64% | 982 | 2 | City |
| Stowell | 8 | 2,011 | 1,855 | 0.85% | 200 | 10 | CDP |
| Old River-Winfree | 9 | 1,402 | 1,304 | 1.37% | 895 | 2 | City |
| Old River-Winfree | 10 | 1,402 | 1,307 | 1.37% | 895 | 2 | City |
| Ames | 11 | 1,274 | 945 | 5.29% | 386 | 3 | City |
| Ames | 12 | 1,274 | 954 | 5.29% | 386 | 3 | City |
| Kenefick | 13 | 853 | 616 | 5.7% | 550 | 2 | Town |
| Kenefick | 14 | 853 | 623 | 5.7% | 550 | 2 | Town |
| Cove | 15 | 714 | 546 | 4.69% | 587 | 1 | City |
| Cove | 16 | 714 | 552 | 4.69% | 587 | 1 | City |
| Oak Island | 17 | 229 | 334 | -3.78% | 191 | 1 | CDP |
| Dayton Lakes | 18 | 60 | 45 | 5.26% | 70 | 1 | City |
| Dayton Lakes | 19 | 60 | 45 | 5.26% | 70 | 1 | City |
Mont Belvieu is the largest city in Chambers County, with a population of 10,820.
Dayton Lakes is the smallest city in Chambers County, with a population of 60.
There are 19 cities in Chambers County, Texas.