[3] Pen Argyl was once home to Lehigh and New England Railroad’s main freight yard and maintenance complex.

The railroad’s roundhouse and shop building still stand just west of town along Pennsylvania Ave.

According to the U.S. Census Bureau, the borough has a total area of 1.4 square miles (3.6 km2), of which 0.71% is water.

It follows Pennsylvania Avenue, Main Street, and Blue Valley Drive along a southwest-northeast alignment through the middle of the borough.

Students in grade nine through 12 attend Pen Argyl Area High School.

Pen Argyl is the burial place of actress Jayne Mansfield, whose family requested to have her body buried in Fairview Cemetery, located on the borough's outskirts.

It is also home to the Weona Park Dentzel carousel, which is listed in the National Register of Historic Places.

[9] Pen Argyl is home to Real English Foods, Inc, the company behind Mr. Pastie.