Annville Township is a township and census-designated place in Lebanon County, Pennsylvania, United States. The population was 4,767 at the 2010 census.

Lebanon County is a county in the Commonwealth of Pennsylvania, United States. As of the 2020 census, the population was 143,257. Its county seat is the city of Lebanon. It lies 72 miles northwest of Philadelphia, which is the nearest major city. The county is part of the South Central Pennsylvania region of the state.