4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Williamsport | 1 | 1,957 | 1,945 | 0.1% | 1,500 | 1 | Town |
| West Lebanon | 2 | 685 | 682 | 0.15% | 1,114 | 1 | Town |
| Pine Village | 3 | 211 | 211 | 0% | 1,758 | 0 | Town |
| State Line City | 4 | 123 | 122 | 0% | 885 | 0 | Town |
Williamsport is the largest city in Warren County, with a population of 1,957.
State Line City is the smallest city in Warren County, with a population of 123.
There are 4 cities in Warren County, Indiana.