Port William
- County:
- Clinton County
- County Seat:
- No
- Area (mi²):
- 0.109
- State:
- Ohio
Port William is a village located in Clinton County, Ohio. Port William has a 2026 population of 220. Port William is currently declining at a rate of -0.45% annually and its population has decreased by -1.35% since the most recent census, which recorded a population of 223 in 2020.
The median household income in Port William is $48,750 with a poverty rate of 28%. The median age in Port William is 52.3 years: 53.4 years for males, and 50 years for females. For every 100 females there are 98.9 males.