South Annville Township is located in Lebanon County PA, USA. As of the census in 2000, the population was 2,946.
The township has a total of 19.6 square miles. Points of interest for the area are the Annville Cleona High School and Weaber's Inc. Weaber's Inc. is one of the most modern lumber mills east of the Mississippi.
The township is bordered to the north and west by North Annville Township (3.2 mi), to the south and west by South Annville Township (3 mi), and to the east by Cleona (0.47 mi) and North Cornwall Township (0.25 mi).