
Mass City
- County:
- Ontonagon County
- County Seat:
- No
- Area (mi²):
- 0.538
- State:
- Michigan
Mass City is a CDP located in Ontonagon County, Michigan. Mass City has a 2025 population of 224. Mass City is currently growing at a rate of 7.18% annually and its population has increased by 31.76% since the most recent census, which recorded a population of 170 in 2020.
The average household income in Mass City is $79,044 with a poverty rate of 4.95%. The median age in Mass City is 52 years: 48.8 years for males, and 57.5 years for females.