Hellertown is a borough in Northampton County, Pennsylvania, United States. Hellertown is located in the Lehigh Valley region of the state, and geographically in the Lehigh Valley's Saucon Valley. The population of Hellertown was 5,898 at the 2010 census.
Hellertown is home to Lost River Caverns.
Hellertown is located at 40°35′3″N 75°20′17″W (40.584099, -75.338139).
According to the United States Census Bureau, the borough has a total area of 1.3 square miles (3.4 km2), all land.
Hellertown Borough elects seven council members at large.
Pennsylvania Route 412 runs north-south through Hellertown on Main Street, heading north to Bethlehem and south into Bucks County, where it provides access to Pennsylvania Route 611. PA 412 has an interchange with Interstate 78 on the northern edge of Hellertown, which heads west to Allentown and Harrisburg and east to Easton and New York City.
LANTA provides bus service to Hellertown along Route 215, which provides service Monday-Saturday north to Bethlehem and Lehigh Valley International Airport, and Route 105, which provides Sunday service north to Bethlehem and the Lehigh Valley Mall. Klein Transportation and Trans-Bridge Lines provide bus service from Hellertown to New York City from a park and ride lot located at the interchange between I-78 and PA 412. Hellertown formerly had commuter rail service along SEPTA's Bethlehem Line north to Bethlehem and south to Philadelphia at Hellertown station, but service ended in 1981.