Chamberlin Iron Front Building is a historic commercial building located on Market Street in Lewisburg, Union County, Pennsylvania. It was built in 1868, and is a three-story, brick building with a two-story rear addition in the Italianate style. It measures 56 feet wide and 160 feet deep. The main section has a flat roof and the addition a gable roof. It features a cast-iron front manufactured in Danville, Pennsylvania. Over the years the building has housed a general store, shoe store, feed store, and post office, as well as fraternal organizations on the upper floors.[2]