About This Place
Dayton is a borough in Armstrong County, Pennsylvania, United States. The population was 543 at the 2000 census.
Dayton is located at 40°52′52″N 79°14′29″W / 40.88111°N 79.24139°W / 40.88111; -79.24139 (40.881095, -79.241526).
According to the United States Census Bureau, the borough has a total area of 0.4 square miles (1.2 km²), all of it land.