Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Salem Friends Church | Church | 218 | Henry | 40 51 10 N | 091 37 16 W |
| Salem Lutheran Cemetery | Cemetery | 213 | Des Moines | 40 54 11 N | 091 12 17 W |
| Salem Lutheran Church | Church | 265 | Jackson | 42 09 12 N | 090 35 18 W |
| Salem Lutheran Church | Church | 196 | Jackson | 42 04 13 N | 090 25 58 W |
| Salem Lutheran Church | Church | 312 | Story | 42 09 59 N | 093 29 60 W |
| Salem Lutheran Church | Church | 399 | Union | 41 04 15 N | 094 22 08 W |
| Salem Lutheran Church | Church | 392 | Winnebago | 43 24 59 N | 093 31 56 W |
| Salem Memorial Cemetery | Cemetery | 402 | Winnebago | 43 26 44 N | 093 30 53 W |
| Salem Mennonite Church | Church | 350 | Decatur | 40 53 51 N | 093 44 06 W |
| Salem Post Office | Post Office | 218 | Henry | 40 51 10 N | 091 37 13 W |
| Salem Reform Cemetery | Cemetery | 420 | Sac | 42 21 20 N | 095 11 13 W |
| Salem Reformed Church | Church | 454 | Lyon | 43 26 39 N | 095 53 00 W |
| Salem School | School | 335 | Dubuque | 42 22 55 N | 090 40 30 W |
| Salem School | School | 318 | Lucas | 40 58 54 N | 093 15 56 W |
| Salem United Cemetery | Cemetery | 362 | Allamakee | 43 13 47 N | 091 35 14 W |
| Salem United Church of Christ | Church | 304 | Polk | 41 49 08 N | 093 36 50 W |
| Salem United Methodist Church | Church | 289 | Benton | 42 00 35 N | 092 05 18 W |
| Salem United Methodist Church | Church | 336 | Hardin | 42 18 17 N | 093 17 49 W |
| Salem United Methodist Church | Church | 220 | Linn | 41 58 31 N | 091 40 30 W |
| Salem United Methodist Church | Church | 351 | Pottawattamie | 41 13 56 N | 095 47 54 W |
| Salem's Lutheran Cemetery | Cemetery | 223 | Jackson | 42 04 22 N | 090 26 30 W |
| Sales Cemetery | Cemetery | 281 | Appanoose | 40 52 41 N | 092 43 45 W |
| Salina | Populated Place | 230 | Jefferson | 41 02 45 N | 091 49 60 W |
| Salina Cemetery | Cemetery | 225 | Jefferson | 41 02 31 N | 091 49 60 W |
| Salina Post Office (historical) | Post Office | 230 | Jefferson | 41 02 45 N | 091 49 60 W |
| Salisbury Cemetery | Cemetery | 332 | Carroll | 42 07 34 N | 094 40 19 W |
| Salisbury House | Building | 282 | Polk | 41 34 45 N | 093 40 18 W |
| Salix | Locale | 329 | Woodbury | 42 18 28 N | 096 17 06 W |
| Salix | Populated Place | 329 | Woodbury | 42 18 30 N | 096 17 16 W |
| Salix City Hall | Building | 329 | Woodbury | 42 18 27 N | 096 17 15 W |
| Salix Community United Methodist Church | Church | 329 | Woodbury | 42 18 32 N | 096 17 23 W |
| Salix Fire Department | Building | 329 | Woodbury | 42 18 27 N | 096 17 15 W |
| Salix Police Department | Building | 329 | Woodbury | 42 18 27 N | 096 17 15 W |
| Salix Post Office | Post Office | 329 | Woodbury | 42 18 30 N | 096 17 16 W |
| Salsbury Baptist Home | Hospital | 314 | Floyd | 43 03 37 N | 092 40 59 W |
| Salt Creek | Stream | | Davis | 40 53 37 N | 092 15 02 W |
| Salt Creek | Stream | | Tama | 41 52 07 N | 092 17 48 W |
| Salt Creek Post Office (historical) | Post Office | 201 | Davis | 40 51 50 N | 092 15 51 W |
| Salt Creek School | School | 230 | Davis | 40 52 53 N | 092 16 28 W |
| Salt Creek Wildlife Area | Park | 283 | Tama | 41 59 10 N | 092 20 51 W |
| Salter School | School | 207 | Des Moines | 40 48 16 N | 091 06 31 W |
| Salton Park | Park | 402 | Palo Alto | 42 57 10 N | 094 52 01 W |
| Salubria Cemetery | Cemetery | 167 | Van Buren | 40 37 00 N | 091 43 31 W |
| Salvation Army (historical) | Church | 174 | Scott | 41 31 19 N | 090 34 52 W |
| Salvation Army Church | Church | 259 | Black Hawk | 42 30 08 N | 092 20 09 W |
| Salvation Army Church | Church | 340 | Cerro Gordo | 43 09 02 N | 093 12 16 W |
| Salvation Army Church | Church | 177 | Des Moines | 40 48 20 N | 091 06 14 W |
| Salvation Army Church | Church | 191 | Dubuque | 42 30 12 N | 090 40 03 W |
| Salvation Army Church | Church | 198 | Johnson | 41 38 58 N | 091 31 51 W |
| Salvation Army Church | Church | 224 | Linn | 41 58 35 N | 091 41 09 W |
| Salvation Army Church | Church | 304 | Pottawattamie | 41 15 45 N | 095 51 14 W |
| Salvation Army Citadel | Church | 285 | Marshall | 42 03 02 N | 092 54 56 W |
| Salvation Army Temple | Church | 331 | Webster | 42 30 23 N | 094 11 21 W |
| Salveson Cemetery | Cemetery | 394 | Winneshiek | 43 27 41 N | 091 45 11 W |
| Salveson Hall | Building | 390 | Winnebago | 43 15 47 N | 093 38 24 W |
| Sam Doupe Ball Complex | Park | 404 | Cherokee | 42 46 00 N | 095 32 56 W |
| Sam Wise Youth Complex | Park | 287 | Polk | 41 38 50 N | 093 27 16 W |
| Samaritan Hospital South Heliport | Airport | 197 | Clinton | 41 50 22 N | 090 18 48 W |
| Samoa | Populated Place | 189 | Jackson | 42 04 40 N | 090 11 48 W |
| Sampson (historical) | Locale | 369 | Shelby | 41 37 15 N | 095 30 53 W |
| Sampson Post Office (historical) | Post Office | 362 | Shelby | 41 36 50 N | 095 32 11 W |
| Sampson Post Office (historical) | Post Office | 358 | Winneshiek | 43 23 45 N | 091 39 46 W |
| Sams Cemetery | Cemetery | 311 | Jasper | 41 44 50 N | 093 18 07 W |
| Samuel F Miller House Museum | Building | 177 | Lee | 40 23 53 N | 091 22 49 W |
| Samuel Freeman Miller State Historical Marker | Park | 199 | Lee | 40 25 05 N | 091 24 16 W |
| Samuel Jordan Kirkwood State Historical Marker | Park | 201 | Johnson | 41 40 25 N | 091 34 16 W |
| Samuel L Becker Communication Studies Building | Building | 200 | Johnson | 41 39 39 N | 091 32 21 W |
| Samuel Lewis Historical Marker | Park | 223 | Washington | 41 10 47 N | 091 49 03 W |
| Samuel Lutheran Church | Church | 339 | Wright | 42 39 56 N | 093 54 35 W |
| Samuelson Bone Joint and Spine Center | Hospital | 390 | Woodbury | 42 31 07 N | 096 24 15 W |
| San Jose Swimming Pool | Building | 233 | Dubuque | 42 30 25 N | 090 40 50 W |
| San Souci Island | Island | 259 | Black Hawk | 42 31 00 N | 092 22 16 W |
| Sanborn | Locale | 473 | O'Brien | 43 10 48 N | 095 39 23 W |
| Sanborn | Populated Place | 473 | O'Brien | 43 10 54 N | 095 39 20 W |
| Sanborn Chiropractic Clinic | Hospital | 473 | O'Brien | 43 10 56 N | 095 39 19 W |
| Sanborn Christian School | School | 469 | O'Brien | 43 10 53 N | 095 39 38 W |
| Sanborn Co-op Grain Company Elevator | Locale | 482 | Osceola | 43 17 14 N | 095 36 31 W |
| Sanborn Golf and Country Club | Locale | 473 | O'Brien | 43 10 54 N | 095 39 20 W |
| Sanborn Medical Clinic | Hospital | 473 | O'Brien | 43 10 60 N | 095 39 22 W |
| Sanborn Post Office | Post Office | 473 | O'Brien | 43 10 59 N | 095 39 19 W |
| Sanborn Presbyterian Church | Church | 473 | O'Brien | 43 11 03 N | 095 39 14 W |
| Sanborn Public Library | Building | 473 | O'Brien | 43 10 59 N | 095 39 21 W |
| Sand Bar Beach Resort and Trailer Court | Populated Place | 428 | Dickinson | 43 29 15 N | 095 03 16 W |
| Sand Cemetery | Cemetery | 165 | Lee | 40 28 17 N | 091 34 04 W |
| Sand Creek | Stream | | Appanoose | 40 35 31 N | 092 50 59 W |
| Sand Creek | Stream | | Boone | 42 04 30 N | 093 57 26 W |
| Sand Creek | Stream | | Buchanan | 42 20 30 N | 091 44 24 W |
| Sand Creek | Stream | | Clayton | 42 56 33 N | 091 35 06 W |
| Sand Creek | Stream | | Decatur | 40 33 50 N | 093 36 30 W |
| Sand Creek | Stream | | Decatur | 40 50 24 N | 093 57 48 W |
| Sand Creek | Stream | | Delaware | 42 27 12 N | 091 26 33 W |
| Sand Creek | Stream | | Delaware | 42 20 46 N | 091 15 44 W |
| Sand Creek | Stream | | Wapello | 41 02 18 N | 092 27 22 W |
| Sand Creek Access Area | Park | 262 | Buchanan | 42 20 25 N | 091 44 11 W |
| Sand Creek Cemetery | Cemetery | 301 | Delaware | 42 26 33 N | 091 31 08 W |
| Sand Creek State Wildlife Area | Park | 326 | Decatur | 40 51 10 N | 094 00 03 W |
| Sand Hagen Creek | Stream | | Delaware | 42 34 11 N | 091 32 52 W |
| Sand Hill | Summit | 244 | Johnson | 41 41 19 N | 091 42 05 W |
| Sand Hill Cemetery | Cemetery | 249 | Cedar | 41 47 26 N | 091 10 55 W |
| Sand Hill Lake Ditch | Canal | 323 | Monona | 42 12 58 N | 096 18 10 W |
| Sand Hill School (historical) | School | 218 | Scott | 41 43 40 N | 090 40 29 W |
| Sand Hollow School | School | 345 | Mills | 41 07 02 N | 095 41 22 W |
| Sand Prairie Station | Locale | 169 | Lee | 40 29 44 N | 091 34 16 W |
| Sand Ridge Cemetery | Cemetery | 255 | Mahaska | 41 14 58 N | 092 51 42 W |
| Sand Ridge Cemetery | Cemetery | 259 | Marion | 41 28 59 N | 092 53 24 W |
| Sand Run Park | Park | 166 | Louisa | 41 10 08 N | 091 05 16 W |
| Sand Springs | Populated Place | 280 | Delaware | 42 19 03 N | 091 11 22 W |
| Sand Springs Cemetery | Cemetery | 290 | Delaware | 42 19 09 N | 091 10 15 W |
| Sand Springs Post Office (historical) | Post Office | 280 | Delaware | 42 19 03 N | 091 11 22 W |
| Sand Stone (historical) | Locale | 202 | Monroe | 41 05 46 N | 092 30 59 W |