Boundary Rivers
- Mississippi River
- Missouri River
- Big Sioux River
Border Lakes
- Little Spirit Lake, Dickinson County
- Iowa Lake, Emmet County
- Tuttle (Okamanpedan) Lake, Emmet County
- Burt (Swag) Lake, Kossuth County
- Iowa Lake, Osceola County
Inland waters
All waters not designated as Boundary river or Border lake. Sometimes divided into:
- Inland streams
- Inland lakes
- Federal flood control reservoirs
- Coralville Lake
- Rathbun Lake
- Saylorville Lake
- Red Rock Lake
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