| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Lumberton | 1 | 14,274 | 13,626 | 1.07% | 1,064 | 13 | City |
| Silsbee | 2 | 6,560 | 6,912 | -0.8% | 854 | 8 | City |
| Kountze | 3 | 2,171 | 1,961 | 2.07% | 546 | 4 | City |
| Sour Lake | 4 | 1,858 | 1,777 | 0.92% | 807 | 2 | City |
| Rose Hill Acres | 5 | 330 | 324 | 0.3% | 851 | 0 | City |
Lumberton is the largest city in Hardin County, with a population of 14,274.
Rose Hill Acres is the smallest city in Hardin County, with a population of 330.
There are 5 cities in Hardin County, Texas.