Fontanelle
- County:
- Adair County
- County Seat:
- No
- Area (mi²):
- 0.857
- State:
- Iowa
Fontanelle is a city located in Adair County, Iowa. Fontanelle has a 2026 population of 684. Fontanelle is currently growing at a rate of 1.33% annually but its population has decreased by -0.44% since the most recent census, which recorded a population of 687 in 2020.
The median household income in Fontanelle is $67,750 with a poverty rate of 4.86%. The median age in Fontanelle is 47 years: 47.2 years for males, and 46.1 years for females. For every 100 females there are 80.4 males.