Castalia
- County:
- Nash County
- County Seat:
- No
- Area (mi²):
- 0.756
- State:
- North Carolina
Castalia is a town located in Nash County, North Carolina. Castalia has a 2026 population of 275. Castalia is currently growing at a rate of 1.85% annually and its population has increased by 5.36% since the most recent census, which recorded a population of 261 in 2020.
The median household income in Castalia is $45,625 with a poverty rate of 25.1%. The median age in Castalia is 41.3 years: 36.3 years for males, and 54.3 years for females. For every 100 females there are 70.3 males.