Upper Macungie Township is a township in Lehigh County, Pennsylvania, United States. The population of Upper Macungie Township was 26,377 as of the 2020 U.S. census, making it the fourth-fastest growing municipality of any category in Pennsylvania in terms of total population growth between 2010 and 2020.

Breinigsville is an unincorporated community and census-designated place (CDP) in Lehigh County, Pennsylvania. As of the 2020 census, it had a population of 7,495. The town is part of Upper Macungie Township and is located approximately 11 miles (18 km) southwest of downtown Allentown and 8 miles (13 km) east of Kutztown.