Sabula, IA

Sabula is Iowa's only island city, sitting in the Mississippi River and connected to the mainland by a causeway bridge. Most visitors arrive via Highway 52 from Clinton (25 miles) or Dubuque (45 miles), then take Highway 64 across the bridge. The river location moderates the typical Iowa climate and creates unique flooding challenges. The town operates Iowa's only island post office, which has served residents since 1851 despite occasional flood relocations.