
Millis
- County:
- Norfolk County
- County Seat:
- No
- Area (mi²):
- 12.033
- State:
- Massachusetts
Millis is located in Norfolk County, Massachusetts. Millis has a 2025 population of 9,378. Millis is currently growing at a rate of 1.96% annually and its population has increased by 10.3% since the most recent census, which recorded a population of 8,502 in 2020.
The average household income in Millis is $164,971 with a poverty rate of 4.88%. The median age in Millis is 47.3 years: 44.7 years for males, and 50 years for females.