The Old Lehigh County Courthouse is a historic county courthouse located at 503 West Hamilton Street in Allentown, Pennsylvania.

It was added to the National Register of Historic Places in 1981.

[1] The courthouse's original section was built between 1814 and 1819 and was a two-and-one-half-story stone building with a hipped roof.

Between 1914 and 1916, a second addition was added to its north between 1914 and 1916 in the Beaux-Arts style.

[2] The courthouse is featured on the Lehigh County seal, which was introduced in 1944.