Yoccos

3 locations in Allentown of the hot dogs that built allentown! Just kidding. Still a damn good hot dog.
One off of Liberty st, another behind 4th, another on 222 and 100.(technically not allentown, but fogelsville, an unincorporated suburb of allentown)
Willy Joes also in Allentown. Willy Joes claims to have the best hot dogs in allentown. If you find yourself in Allentown try them both and decide for yourself. At the prices you can eat a lotta dogs.
Willy Joes is located on lehigh street (get off I-78 and go toward center city allentown, can’t miss it)