
South Annville township
- County:
- Lebanon County
- County Seat:
- No
- Area (mi²):
- 19.469
- State:
- Pennsylvania
South Annville township is located in Lebanon County, Pennsylvania. South Annville township has a 2025 population of 3,467. South Annville township is currently growing at a rate of 0.26% annually and its population has increased by 0.84% since the most recent census, which recorded a population of 3,438 in 2020.
The average household income in South Annville township is $139,343 with a poverty rate of 8.9%. The median age in South Annville township is 34.7 years: 35.1 years for males, and 33.9 years for females.