Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Manchester Family Medical Associates Center | Hospital | 293 | Delaware | 42 29 03 N | 091 27 56 W |
| Manchester Golf and Country Club | Locale | 301 | Delaware | 42 28 08 N | 091 26 16 W |
| Manchester Gospel Hall | Church | 292 | Delaware | 42 30 03 N | 091 27 41 W |
| Manchester Municipal Airport | Airport | 291 | Delaware | 42 29 36 N | 091 29 55 W |
| Manchester National Fish Hatchery | Locale | 287 | Delaware | 42 27 42 N | 091 23 48 W |
| Manchester Police Department | Building | 287 | Delaware | 42 29 03 N | 091 27 22 W |
| Manchester Post Office | Post Office | 287 | Delaware | 42 29 00 N | 091 27 26 W |
| Manchester Public Library | Building | 287 | Delaware | 42 29 10 N | 091 27 31 W |
| Mangold Hollow | Valley | | Dubuque | 42 35 42 N | 090 50 58 W |
| Mangold School | Locale | 272 | Dubuque | 42 36 32 N | 090 51 05 W |
| Mangoldville Post Office (historical) | Post Office | 318 | Delaware | 42 18 24 N | 091 26 31 W |
| Manhattan Beach | Beach | 431 | Dickinson | 43 23 29 N | 095 10 02 W |
| Manhattan Beach Resort | Populated Place | 431 | Dickinson | 43 23 28 N | 095 10 03 W |
| Manhattan Point | Cape | 426 | Dickinson | 43 23 32 N | 095 09 54 W |
| Manhattan Post Office (historical) | Post Office | 433 | Dickinson | 43 23 35 N | 095 10 01 W |
| Manhattan Robbins Lake Park | Park | 219 | Linn | 42 00 29 N | 091 42 13 W |
| Manhatten Bridge County Park | Park | 195 | Keokuk | 41 14 20 N | 092 06 30 W |
| Manhatten Post Office (historical) | Post Office | 212 | Keokuk | 41 14 30 N | 092 06 30 W |
| Manilla | Locale | 403 | Crawford | 41 53 25 N | 095 14 09 W |
| Manilla | Populated Place | 413 | Crawford | 41 53 23 N | 095 13 56 W |
| Manilla City Hall | Building | 412 | Crawford | 41 53 24 N | 095 13 57 W |
| Manilla Firemans Hall | Building | 415 | Crawford | 41 53 24 N | 095 13 53 W |
| Manilla Manor | Hospital | 409 | Crawford | 41 53 32 N | 095 13 56 W |
| Manilla Medical Clinic | Hospital | 408 | Crawford | 41 53 24 N | 095 14 01 W |
| Manilla Memorial Hall | Building | 416 | Crawford | 41 53 22 N | 095 13 53 W |
| Manilla Post Office | Post Office | 408 | Crawford | 41 53 24 N | 095 14 01 W |
| Manilla Public Library | Building | 412 | Crawford | 41 53 24 N | 095 13 57 W |
| Manley Cemetery | Cemetery | 293 | Monroe | 41 01 43 N | 093 00 59 W |
| Manly | Locale | 365 | Worth | 43 17 27 N | 093 12 12 W |
| Manly | Populated Place | 366 | Worth | 43 17 14 N | 093 12 08 W |
| Manly Caboose Museum | Building | 360 | Worth | 43 17 05 N | 093 11 36 W |
| Manly Cemetery | Cemetery | 363 | Worth | 43 17 26 N | 093 12 01 W |
| Manly City Fire Station | Building | 369 | Worth | 43 17 22 N | 093 12 20 W |
| Manly City Hall | Building | 365 | Worth | 43 17 10 N | 093 12 03 W |
| Manly Nursing and Rehabilitation Center | Hospital | 360 | Worth | 43 16 60 N | 093 11 29 W |
| Manly Police Department | Building | 365 | Worth | 43 17 10 N | 093 12 03 W |
| Manly Post Office | Post Office | 363 | Worth | 43 17 14 N | 093 11 60 W |
| Manly Public Library | Building | 366 | Worth | 43 17 14 N | 093 12 21 W |
| Mann Cemetery | Cemetery | 245 | Jones | 42 00 50 N | 091 16 41 W |
| Mann Elementary School | School | 287 | Polk | 41 31 12 N | 093 37 39 W |
| Mann School | School | 209 | Des Moines | 40 47 57 N | 091 06 58 W |
| Mann School | School | 210 | Johnson | 41 40 03 N | 091 31 34 W |
| Mann School | School | 253 | Wapello | 41 02 12 N | 092 24 25 W |
| Mann Wilderness Area | Park | 326 | Hardin | 42 28 05 N | 093 05 56 W |
| Manning | Locale | 414 | Carroll | 41 54 50 N | 095 03 36 W |
| Manning | Populated Place | 413 | Carroll | 41 54 33 N | 095 03 54 W |
| Manning Cemetery | Cemetery | 427 | Carroll | 41 53 57 N | 095 03 44 W |
| Manning City Library | Building | 414 | Carroll | 41 54 31 N | 095 03 54 W |
| Manning Fire Station | Building | 414 | Carroll | 41 54 26 N | 095 03 51 W |
| Manning High School | School | 411 | Carroll | 41 54 14 N | 095 03 21 W |
| Manning Municipal Airport | Airport | 408 | Carroll | 41 53 60 N | 095 04 01 W |
| Manning Police Department | Building | 414 | Carroll | 41 54 26 N | 095 03 51 W |
| Manning Post Office | Post Office | 412 | Carroll | 41 54 35 N | 095 03 54 W |
| Manning Regional Healthcare Center | Hospital | 415 | Carroll | 41 54 27 N | 095 03 54 W |
| Manning School | School | 218 | Henry | 40 57 41 N | 091 33 27 W |
| Manor Care Health Services | Hospital | 210 | Scott | 41 32 17 N | 090 33 48 W |
| Manor Care Health Services Center | Hospital | 288 | Black Hawk | 42 28 11 N | 092 21 35 W |
| Manor Care Health Services Center | Hospital | 236 | Linn | 41 59 33 N | 091 38 43 W |
| Manor House Care Center | Hospital | 230 | Keokuk | 41 19 24 N | 092 12 24 W |
| Manor of Malvern | Hospital | 312 | Mills | 41 00 30 N | 095 35 11 W |
| Mansion Museum | Building | 390 | Winnebago | 43 15 58 N | 093 38 18 W |
| Manson | Locale | 376 | Calhoun | 42 31 40 N | 094 32 03 W |
| Manson | Populated Place | 378 | Calhoun | 42 31 45 N | 094 32 03 W |
| Manson Branch | Stream | | Appanoose | 40 44 04 N | 092 53 45 W |
| Manson Elementary School | School | 378 | Calhoun | 42 31 59 N | 094 31 43 W |
| Manson Fairground Park | Park | 378 | Calhoun | 42 32 20 N | 094 32 05 W |
| Manson Golf and Country Club | Locale | 377 | Calhoun | 42 32 14 N | 094 31 51 W |
| Manson Good Samaritan Center | Hospital | 378 | Calhoun | 42 32 04 N | 094 32 05 W |
| Manson High School | School | 378 | Calhoun | 42 32 09 N | 094 31 45 W |
| Manson Library | Building | 378 | Calhoun | 42 31 54 N | 094 31 56 W |
| Manson Mennonite Church | Church | 375 | Calhoun | 42 31 33 N | 094 31 58 W |
| Manson Post Office | Post Office | 378 | Calhoun | 42 31 47 N | 094 32 09 W |
| Manson Town Police Department | Building | 378 | Calhoun | 42 31 58 N | 094 32 08 W |
| Manteno | Populated Place | 354 | Shelby | 41 49 57 N | 095 32 14 W |
| Manteno County Park | Park | 385 | Shelby | 41 51 16 N | 095 27 50 W |
| Manti | Locale | 303 | Fremont | 40 43 42 N | 095 24 33 W |
| Manti Cemetery | Cemetery | 313 | Fremont | 40 43 24 N | 095 23 58 W |
| Manti Cemetery - Off the Mormon Trail Historical Marker | Park | 312 | Fremont | 40 43 23 N | 095 23 57 W |
| Manti Memorial Park | Park | 311 | Fremont | 40 43 35 N | 095 24 03 W |
| Manti Post Office (historical) | Post Office | 300 | Fremont | 40 43 42 N | 095 24 11 W |
| Mantoyne Cemetery | Cemetery | 225 | Van Buren | 40 37 50 N | 092 00 51 W |
| Manual Arts School | School | 267 | Black Hawk | 42 31 39 N | 092 26 40 W |
| Maple | Locale | 436 | Cherokee | 42 49 21 N | 095 26 50 W |
| Maple Cemetery | Cemetery | 354 | Kossuth | 43 22 17 N | 094 05 07 W |
| Maple Creek | Stream | | Cherokee | 42 43 18 N | 095 28 31 W |
| Maple Crest Manor Nursing Home | Hospital | 324 | Fayette | 42 50 29 N | 091 48 31 W |
| Maple Glenn School (historical) | School | 183 | Scott | 41 42 29 N | 090 22 53 W |
| Maple Grove | Locale | 366 | Madison | 41 20 20 N | 094 09 59 W |
| Maple Grove Cemetery | Cemetery | 424 | Audubon | 41 43 42 N | 094 55 31 W |
| Maple Grove Cemetery | Cemetery | 338 | Boone | 42 04 46 N | 094 05 10 W |
| Maple Grove Cemetery | Cemetery | 334 | Chickasaw | 42 57 42 N | 092 09 40 W |
| Maple Grove Cemetery | Cemetery | 317 | Marshall | 41 57 50 N | 093 03 27 W |
| Maple Grove Cemetery | Cemetery | 283 | Tama | 41 53 29 N | 092 37 38 W |
| Maple Grove Cemetery | Cemetery | 235 | Van Buren | 40 38 19 N | 092 04 06 W |
| Maple Grove Church | Church | 434 | Clay | 43 00 39 N | 095 22 19 W |
| Maple Grove Church | Church | 314 | Dallas | 41 34 51 N | 093 50 14 W |
| Maple Grove Church | Church | 381 | Taylor | 40 50 30 N | 094 51 08 W |
| Maple Grove Post Office (historical) | Post Office | 366 | Madison | 41 19 46 N | 094 09 48 W |
| Maple Grove School | School | 292 | Polk | 41 31 38 N | 093 37 34 W |
| Maple Grove School | School | 333 | Wayne | 40 47 49 N | 093 28 19 W |
| Maple Grove School (historical) | School | 198 | Clinton | 41 45 10 N | 090 23 38 W |
| Maple Grove School (historical) | School | 241 | Muscatine | 41 31 28 N | 090 50 29 W |
| Maple Hall | Building | 274 | Story | 42 01 25 N | 093 38 16 W |
| Maple Heights Assembly of God Church | Church | 319 | Floyd | 43 04 30 N | 092 41 55 W |
| Maple Heights Golf and Country Club | Locale | 371 | Howard | 43 14 53 N | 092 25 56 W |
| Maple Hill | Locale | 389 | Emmet | 43 23 34 N | 094 35 41 W |
| Maple Hill | Populated Place | 388 | Emmet | 43 23 32 N | 094 37 31 W |
| Maple Hill Cemetery | Cemetery | 342 | Allamakee | 43 10 15 N | 091 20 50 W |
| Maple Hill Cemetery | Cemetery | 348 | Clarke | 41 01 40 N | 093 46 47 W |
| Maple Hill Cemetery | Cemetery | 350 | Page | 40 36 52 N | 095 07 24 W |