Kittanning
- County:
- Armstrong County
- County Seat:
- Yes
- Area (mi²):
- 0.996
- State:
- Pennsylvania
Kittanning is a borough located in Armstrong County, Pennsylvania. Kittanning has a 2026 population of 3,920. It is also the county seat of Armstrong County. Kittanning is currently growing at a rate of 0.8% annually and its population has increased by 0.03% since the most recent census, which recorded a population of 3,919 in 2020.