Northumberland, PA

ZIP code 17857 encompasses the town of Mifflinburg, Pennsylvania. Known for its historic charm and quaint downtown area, Mifflinburg is home to several notable landmarks including the Mifflinburg Buggy Museum, the Union County Historical Society, and the Rusty Rail Brewing Company. With a mix of small businesses, restaurants, and cultural attractions, this area offers visitors a glimpse into Pennsylvania's rich history and community spirit.