| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Beaumont | 1 | 112,524 | 114,791 | -0.39% | 1,370 | 82 | City |
| Port Arthur | 2 | 55,792 | 56,027 | -0.02% | 738 | 76 | City |
| Nederland | 3 | 17,952 | 18,788 | -0.86% | 3,168 | 6 | City |
| Groves | 4 | 16,810 | 17,294 | -0.57% | 3,225 | 5 | City |
| Port Neches | 5 | 13,786 | 13,680 | 0.13% | 1,604 | 9 | City |
| China | 6 | 1,344 | 1,333 | 0.07% | 887 | 2 | City |
| Bevil Oaks | 7 | 1,031 | 1,087 | -1.06% | 506 | 2 | City |
| Nome | 8 | 472 | 474 | 0% | 405 | 1 | City |
| Taylor Landing | 9 | 287 | 278 | 0.7% | 254 | 1 | City |
Beaumont is the largest city in Jefferson County, with a population of 112,524.
Taylor Landing is the smallest city in Jefferson County, with a population of 287.
There are 9 cities in Jefferson County, Texas.