Iowa State Preserves tend to be small parcels of land with some historic or environmental significance. The arrangement is alphabetic. This is based on information found at a website maintained by the Iowa Department of Natural Resources.

• A.F. Miller State Preserve
• Ames High Prairie State Preserve
• Anderson Prairie State Preserve
• Behrens Pond and Woodlands State Preserve
• Berry Woods State Preserve
• Bird Hill State Preserve
• Bixby State Preserve
• Bluffton Fir Stand State Preserve
• Brush Creek Canyon State Preserve
• Brushy Creek State Preserve
• Cameron Woods State Preserve
• Casey's Paha State Preserve
• Catfish Creek State Preserve
• Cayler Prairie State Preserve
• Cedar Bluffs State Preserve
• Cedar Hills Sand Prairie State Preserve
• Cheever Lake State Preserve
• Clay Prairie State Preserve
• Claybanks Forest State Preserve
• Cold Water Spring State Preserve
• Crossman Prairie State Preserve
• Decorah Ice Cave State Preserve
• Dinesen Prairie State Preserve
• Doolittle Prairie State Preserve
• Fallen Rock State Preserve
• Fish Farm Mounds State Preserve
• Five Ridge Prairie State Preserve
• Fleming Woods State Preserve
• Fort Atkinson State Preserve
• Freda Haffner Kettlehole State Preserve
• Gitchie Manitou State Preserve
• Hanging Bog State Preserve
• Hardin City Woodland State Preserve
• Hartley Fort State Preserve
• Hayden Prairie State Preserve
• Hoffman Prairie State Preserve
• Indian Bluffs Primitive Area State Preserve
• Indian Fish Trap State Preserve
• Kalsow Prairie State Preserve
• Kish-Ke-Kosh Prairie State Preserve
• Lamson Woods State Preserve
• Liska-Stanek Prairie State Preserve
• Little Maquoketa River Mounds State Preserve
• Malanaphy Springs State Preserve
• Malchow Mounds State Preserve
• Manikowski Prairie State Preserve
• Mann Wilderness Area State Preserve
• Marietta Sand Prairie State Preserve
• Mericle Woods State Preserve
• Merrill A. Stainbrook State Preserve
• Merritt Forest State Preserve
• Montauk State Preserve
• Mossy Glen State Preserve
• Mount Pisgah Cemetery State Preserve
• Mount Talbot State Preserve
• Nestor Stiles Prairie State Preserve
• Ocheyedan Mound State Preserve
• Old State Quarry State Preserve
• Palisades-Downs State Preserve
• Pecan Grove State Preserve
• Pellett Woods State Preserve
• Pilot Grove State Preserve
• Pilot Knob State Preserve
• Retz Woods State Preserve
• Roberts Creek State Preserve
• Rock Creek Island State Preserve
• Rock Island State Preserve
• Roggman Boreal Slopes State Preserve
• Rolling Thunder Prairie State Preserve
• Saint James Lutheran Church State Preserve
• Savage Woods State Preserve
• Searryl's Cave State Preserve
• Sheeder Prairie State Preserve
• Silver Lake Fen State Preserve
• Silvers-Smith Woods State Preserve
• Slinde Mounds State Preserve
• Starr's Cave State Preserve
• Steele Prairie State Preserve
• Stinson Prairie State Preserve
• Strasser Woods State Preserve
• Sylvan Runkel State Preserve
• Toolesboro Mounds State Preserve
• Turin Loess Hills State Preserve
• Turkey River Mounds State Preserve
• White Pine Hollow State Preserve
• Williams Prairie State Preserve
• Wittrock Indian Village State Preserve
• Woodland Mounds State Preserve
• Woodman Hollow State Preserve
• Woodthrush State Preserve