
Garrison
- County:
- Benton County
- County Seat:
- No
- Area (mi²):
- 0.308
- State:
- Iowa
Garrison is a city located in Benton County, Iowa. Garrison has a 2025 population of 344. Garrison is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 344 in 2020.
The average household income in Garrison is $66,471 with a poverty rate of 17.47%. The median age in Garrison is 40.3 years: 32 years for males, and 49.7 years for females.