5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lumberton | 1 | 14,570 | 13,624 | 1.1% | 1,087 | 13 | City |
| Silsbee | 2 | 6,597 | 6,938 | -0.86% | 859 | 8 | City |
| Kountze | 3 | 2,207 | 1,960 | 1.89% | 555 | 4 | City |
| Sour Lake | 4 | 1,879 | 1,777 | 0.91% | 816 | 2 | City |
| Rose Hill Acres | 5 | 336 | 324 | 0.6% | 866 | 0 | City |
Lumberton is the largest city in Hardin County, with a population of 14,570.
Rose Hill Acres is the smallest city in Hardin County, with a population of 336.
There are 5 cities in Hardin County, Texas.