Hamilton
- County:
- Marion County
- County Seat:
- No
- Area (mi²):
- 0.506
- State:
- Iowa
Hamilton is a city located in Marion County, Iowa. Hamilton has a 2026 population of 125. Hamilton is currently growing at a rate of 2.46% annually and its population has increased by 3.31% since the most recent census, which recorded a population of 121 in 2020.
The median household income in Hamilton is $63,750 with a poverty rate of 19.63%. The median age in Hamilton is 37.6 years: 36 years for males, and 40.1 years for females. For every 100 females there are 137.8 males.