Port Huron
- County:
- St. Clair County
- County Seat:
- Yes
- Area (mi²):
- 8.102
- State:
- Michigan
Port Huron is a city located in St. Clair County, Michigan. Port Huron has a 2026 population of 28,342. It is also the county seat of St. Clair County. Port Huron is currently declining at a rate of -0.46% annually and its population has decreased by -2.05% since the most recent census, which recorded a population of 28,935 in 2020.