diamondhead lake is in what ia county
Lake Marie in Mercer County MO Diamondhead Lake - Cultural Feature (Reservoir) in Guthrie County. Diamondhead Lake is a cultural feature (reservoir) in Guthrie County. The primary coordinates for Diamondhead Lake places it within the IA 50070 ZIP Code delivery area. In the Maps and Aerial Photos section below, you'll find links to: (1) Local area photos around Diamondhead Lake, (2) A listing of the nearest hotels to Diamondhead Lake and (3) Driving Directions to Diamondhead Lake from almost anywhere.