
Nauvoo
- County:
- Hancock County
- County Seat:
- No
- Area (mi²):
- 3.386
- State:
- Illinois
Nauvoo is a city located in Hancock County, Illinois. Nauvoo has a 2025 population of 911. Nauvoo is currently declining at a rate of -0.65% annually and its population has decreased by -3.19% since the most recent census, which recorded a population of 941 in 2020.
The average household income in Nauvoo is $70,639 with a poverty rate of 32.81%. The median age in Nauvoo is 41.6 years: 40 years for males, and 50.2 years for females.