
Callahan
- County:
- Nassau County
- County Seat:
- No
- Area (mi²):
- 1.807
- State:
- Florida
Callahan is a town located in Nassau County, Florida. Callahan has a 2025 population of 1,972. Callahan is currently growing at a rate of 4.62% annually and its population has increased by 28.3% since the most recent census, which recorded a population of 1,537 in 2020.
The average household income in Callahan is $71,232 with a poverty rate of 14.78%. The median age in Callahan is 35.3 years: 29.9 years for males, and 36.9 years for females.