Coopersburg is a borough in Lehigh County, Pennsylvania, United States. It is a suburb of Allentown in the Lehigh Valley region of the state. Lehigh County is included in the Allentown-Bethlehem-Easton, PA-NJ Metropolitan Statistical Area, which is also included in the New York City-Newark, New Jersey, NY-NJ-CT-PA Combined Statistical Area. The population of Coopersburg was 2,386 at the 2010 census.