Williamsport
- County:
- Warren County
- County Seat:
- Yes
- Area (mi²):
- 1.305
- State:
- Indiana
Williamsport is a town located in Warren County, Indiana. Williamsport has a 2026 population of 1,953. It is also the county seat of Warren County. Williamsport is currently declining at a rate of -0.46% annually but its population has increased by 0.41% since the most recent census, which recorded a population of 1,945 in 2020.
The median household income in Williamsport is $65,550 with a poverty rate of 14.96%. The median age in Williamsport is 41.9 years: 41.8 years for males, and 43.2 years for females. For every 100 females there are 97.6 males.