| NUMBER | NAME | COUNTY | LAT | LON |
| IA04 | Adams Island | Scott | 414436N | 0901905W |
| IA04 | Baby Rush Island | Des Moines | 404958N | 0910501W |
| IA01 | Barnets Island | Benton | 421423N | 0920248W |
| IA01 | Beaver Island | Clinton | 414845N | 0901214W |
| IA01 | Big Cook Island | Clinton | 420145N | 0900934W |
| IA03 | Blackhawk Island | Louisa | 410600N | 0905735W |
| IA02 | Boatman Island | Polk | 413631N | 0933645W |
| IOA1 | Boy Scout Islands | Jackson | 420656N | 0901000W |
| IA01 | Cedar Island | Jones | 420251N | 0911102W |
| IA01 | Cook Island | Clinton | 420109N | 0900919W |
| IA04 | Corsepius Island | Louisa | 410903N | 0905931W |
| IA04 | Credit Island | Scott | 412936N | 0903714W |
| IA01 | Deadmans Island | Black Hawk | 423323N | 0922857W |
| IA01 | Delphey Island | Allamakee | 431135N | 0910909W |
| IA04 | Devils Island | Lee | 403547N | 0912316W |
| IA04 | Dollar Island | Des Moines | 404204N | 0910704W |
| IA04 | Dutchman Island | Lee | 403816N | 0911610W |
| IA01 | Eldridge Island | Jackson | 420508N | 0901005W |
| IA01 | French Island | Clayton | 425217N | 0910511W |
| IA04 | Fretter Island | Des Moines | 404936N | 0910533W |
| IA04 | Geneva Island | Muscatine | 412606N | 0905758W |
| IA01 | Goetz Island | Clayton | 424606N | 0910518W |
| IA04 | Goose Island | Muscatine | 412553N | 0905509W |
| IA04 | Grape Island | Lee | 403934N | 0910932W |
| IA01 | Hamm Island | Dubuque | 423053N | 0903839W |
| IA01 | Henderson Island | Allamakee | 432836N | 0911340W |
| IA04 | Hog Island | Muscatine | 412551N | 0910002W |
| IA04 | Hog Island | Muscatine | 412547N | 0910100W |
| IA04 | Hogback Island | Des Moines | 405134N | 0910310W |
| IA04 | Horse Island | Scott | 412800N | 0903913W |
| IA01 | Hovie Island | Clayton | 425316N | 0910637W |
| IA01 | Hubbel Island | Jackson | 420314N | 0901017W |
| IA04 | Huron Island | Des Moines | 410230N | 0905742W |
| IA01 | Island 176 | Clayton | 425727N | 0910928W |
| IA01 | Island 178 | Clayton | 425603N | 0910923W |
| IA01 | Island 186 | Clayton | 425128N | 0910505W |
| IA01 | Island 188 | Clayton | 424922N | 0910516W |
| IA01 | Island 189 | Clayton | 424441N | 0910353W |
| IA01 | Jackson Island | Allamakee | 431024N | 0910846W |
| IA04 | Johnson Island | Des Moines | 405955N | 0904746W |
| IA04 | Johnson Island | Des Moines | 410015N | 0905715W |
| IA01 | Joyce Island | Clinton | 415125N | 0901050W |
| IA04 | Keg Island | Louisa | 411036N | 0910311W |
| IA04 | Kilpeck Island | Louisa | 411826N | 0910449W |
| IA04 | Lead Island | Lee | 403837N | 0911445W |
| IA01 | Little Cook Island | Clinton | 420145N | 0900918W |
| IA04 | Little Rag Island | Des Moines | 405250N | 0910212W |
| IA04 | Little Turtle Island | Des Moines | 405155N | 0910305W |
| IA01 | McMillan Island | Clayton | 424956N | 0910531W |
| IA04 | Mink Island | Lee | 403841N | 0911540W |
| IA01 | Morse Island | Jackson | 421141N | 0901933W |
| IA04 | Municipal Island | Linn | 415829N | 0914009W |
| IA01 | Murray Island | Allamakee | 431054N | 0910925W |
| IA04 | Muscatine Island | Louisa | 412000N | 0910615W |
| IA04 | Muscatine Island | Muscatine | 412323N | 0910547W |
| IA01 | Ninemile Island | Dubuque | 422604N | 0903422W |
| IA03 | Noddleman Island | Mills | 405615N | 0954941W |
| IA04 | O'connell Island | Des Moines | 405040N | 0910520W |
| IA04 | Otter Island | Des Moines | 405129N | 0910336W |
| IA04 | Otter Island | Louisa | 411146N | 0910408W |
| IA04 | Otter Island | Louisa | 411114N | 0910336W |
| IA04 | Peel Island | Lee | 404049N | 0910805W |
| IA04 | Rabbit Island | Lee | 403632N | 0912228W |
| IA04 | Rabbit Island | Lee | 403635N | 0912228W |
| IA04 | Rag Island | Des Moines | 405327N | 0910150W |
| IA01 | Railroad Island | Jackson | 420935N | 0901419W |
| IA01 | Riprap Island | Jackson | 420728N | 0901137W |
| IA04 | Rush Island | Des Moines | 405023N | 0910450W |
| IA01 | Ryan Island | Allamakee | 431136N | 0910829W |
| IA03 | Schemmel Island | Fremont | 403716N | 0954532W |
| IA01 | Scott Island | Jackson | 421909N | 0902535W |
| IA01 | Squirrel Island | Jones | 421259N | 0905357W |
| IA01 | Stamps Island | Clinton | 415325N | 0900953W |
| IA01 | Sweezy Island | Clayton | 424124N | 0905800W |
| IA04 | Towhead Island | Muscatine | 412419N | 0910313W |
| IA04 | Turkey Island | Wapello | 410142N | 0922557W |
| IA04 | Turkey Island | Louisa | 411205N | 0910441W |
| IA04 | Turtle Island | Des Moines | 405208N | 0910258W |
| IA04 | Upper Twin Island | Des Moines | 404239N | 0910704W |
| IA04 | Willow Island | Scott | 413013N | 0903621W |
| IA03 | Wilson Island | Pottawattamie | 412913N | 0960032W |
