
Bay City
- County:
- Bay County
- County Seat:
- Yes
- Area (mi²):
- 10.166
- State:
- Michigan
Bay City is a city located in Bay County, Michigan. Bay City has a 2025 population of 31,729. It is also the county seat of Bay County. Bay City is currently declining at a rate of -0.55% annually and its population has decreased by -2.7% since the most recent census, which recorded a population of 32,611 in 2020.
The average household income in Bay City is $63,697 with a poverty rate of 21.49%. The median age in Bay City is 39.7 years: 38.1 years for males, and 41.3 years for females.