Blue Ash
- County:
- Hamilton County
- County Seat:
- No
- Area (mi²):
- 7.584
- State:
- Ohio
Blue Ash is a city located in Hamilton County, Ohio. Blue Ash has a 2026 population of 13,616. Blue Ash is currently growing at a rate of 0.98% annually and its population has increased by 1.57% since the most recent census, which recorded a population of 13,405 in 2020.