
Foster
- County:
- Providence County
- County Seat:
- No
- Area (mi²):
- 50.752
- State:
- Rhode Island
Foster is located in Providence County, Rhode Island. Foster has a 2025 population of 4,545. Foster is currently growing at a rate of 0.58% annually and its population has increased by 1.7% since the most recent census, which recorded a population of 4,469 in 2020.
The average household income in Foster is $125,221 with a poverty rate of 3.91%. The median age in Foster is 46.5 years: 47.7 years for males, and 46.1 years for females.