Fort Peck, MT

Located in northeastern Montana, ZIP code 59223 is home to the small town of Fort Peck. The area is most notable for the Fort Peck Dam, one of the largest earth-filled dams in the world, which creates Fort Peck Lake, a popular destination for fishing and boating. The town also features the Fort Peck Interpretive Center, showcasing the history of the area and the construction of the dam.