Stillwater
- County:
- Columbia County
- County Seat:
- No
- Area (mi²):
- 3.114
- State:
- Pennsylvania
Stillwater is a borough located in Columbia County, Pennsylvania. Stillwater has a 2026 population of 199. Stillwater is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 199 in 2020.
The median household income in Stillwater is $85,000 with a poverty rate of 2.37%. The median age in Stillwater is 46.4 years: 37.5 years for males, and 52 years for females. For every 100 females there are 87.8 males.