Marysville
- County:
- Marion County
- County Seat:
- No
- Area (mi²):
- 0.539
- State:
- Iowa
Marysville is a city located in Marion County, Iowa. Marysville has a 2025 population of 46 . Marysville is currently declining at a rate of 0% annually and its population has increased by 2.22% since the most recent census, which recorded a population of 45 in 2020.
The median age in Marysville is 29 years: 39.3 years for males, and 20 years for females. For every 100 females there are 116.7 males.