Swan
- County:
- Marion County
- County Seat:
- No
- Area (mi²):
- 0.617
- State:
- Iowa
Swan is a city located in Marion County, Iowa. Swan has a 2026 population of 79. Swan is currently growing at a rate of 2.6% annually and its population has increased by 3.95% since the most recent census, which recorded a population of 76 in 2020.
The median age in Swan is 58.1 years: 58.1 years for males, and 57.5 years for females. For every 100 females there are 175.0 males.