Arendtsville is a borough in Adams County, Pennsylvania, United States. The borough lies on Pennsylvania Route 234 and it is well known for its annual Apple Harvest Festival in the fall. The population was 952 at the 2010 census.
Arendtsville is located at 39°55′28″N 77°17′50″W / 39.92444°N 77.29722°W / 39.92444; -77.29722 (39.924548, -77.297132).
According to the United States Census Bureau, the borough has a total area of 0.7 square miles (1.8 km2), all of it land.