Atwood
- County:
- Armstrong County
- County Seat:
- No
- Area (mi²):
- 2.092
- State:
- Pennsylvania
Atwood is a borough located in Armstrong County, Pennsylvania. Atwood has a 2026 population of 106. Atwood is currently declining at a rate of -0.93% annually and its population has decreased by -3.64% since the most recent census, which recorded a population of 110 in 2020.