
Flanagan
- County:
- Livingston County
- County Seat:
- No
- Area (mi²):
- 0.576
- State:
- Illinois
Flanagan is a village located in Livingston County, Illinois. Flanagan has a 2025 population of 977. Flanagan is currently declining at a rate of -0.61% annually and its population has decreased by -2.88% since the most recent census, which recorded a population of 1,006 in 2020.
The average household income in Flanagan is $109,783 with a poverty rate of 10.74%. The median age in Flanagan is 49.2 years: 44 years for males, and 54.6 years for females.