Port Washington
- County:
- Ozaukee County
- County Seat:
- Yes
- Area (mi²):
- 5.954
- State:
- Wisconsin
Port Washington is a city located in Ozaukee County, Wisconsin. Port Washington has a 2026 population of 12,750. It is also the county seat of Ozaukee County. Port Washington is currently growing at a rate of 0.37% annually and its population has increased by 2.53% since the most recent census, which recorded a population of 12,435 in 2020.