Oto
- County:
- Woodbury County
- County Seat:
- No
- Area (mi²):
- 0.269
- State:
- Iowa
Oto is a city located in Woodbury County, Iowa. Oto has a 2026 population of 71. Oto is currently declining at a rate of 0% annually and its population has decreased by -1.39% since the most recent census, which recorded a population of 72 in 2020.
The median age in Oto is 50.7 years: 65.1 years for males, and 48.7 years for females. For every 100 females there are 88.9 males.