Macungie is a borough in Lehigh County, Pennsylvania, in the United States. It is the second oldest borough in the county and a suburb of Allentown, Pennsylvania in the Lehigh Valley region of the state. According to the United States Census Bureau, the borough has a total area of 1.0 square mile (2.6 km2), all of it land. Macungie is almost completely surrounded by Lower Macungie Township except for a very small area in the SE that neighbors Upper Milford Township. Swabia Creek flows from the west through the borough, receives Mountain Creek, and flows out of the borough to the northeast before draining into the Little Lehigh Creek.
The Borough is served by the East Penn School District. Emmaus High School serves grades nine through 12. Eyer Middle School and Lower Macungie Middle School serve grades six through eight. Students in kindergarten through grade five attend either Shoemaker Elementary School, Macungie Elementary School, or Willow Lane Elementary School.
Bear Creek Ski and Recreation Area, a locally popular ski resort, is located just west of Macungie in Longswamp Township.