Allendorf, IA

ZIP code 51330 covers the Arnolds Park area in Dickinson County, northwestern Iowa, on the shore of West Okoboji Lake. Its best-known landmarks include Arnolds Park Amusement Park, a historic lakeside attraction; the Iowa Great Lakes Maritime Museum, which explores the region’s boating history; and the Queen II excursion boat. The area is part of the Iowa Great Lakes’ popular recreation and resort region.