
Gardner
- County:
- Worcester County
- County Seat:
- No
- Area (mi²):
- 22.066
- State:
- Massachusetts
Gardner is a city located in Worcester County, Massachusetts. Gardner has a 2025 population of 20,809. Gardner is currently declining at a rate of -0.39% annually and its population has decreased by -1.94% since the most recent census, which recorded a population of 21,221 in 2020.
The average household income in Gardner is $80,065 with a poverty rate of 14.29%. The median age in Gardner is 43.5 years: 41.8 years for males, and 44.3 years for females.