Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Sexton | Populated Place | 372 | Kossuth | 43 04 58 N | 094 05 21 W |
| Sexton Post Office (historical) | Post Office | 372 | Kossuth | 43 04 58 N | 094 05 21 W |
| Seyffer Public Use Area | Park | 272 | Grundy | 42 22 38 N | 092 32 01 W |
| Seymour | Locale | 323 | Wayne | 40 41 10 N | 093 07 03 W |
| Seymour | Populated Place | 323 | Wayne | 40 40 57 N | 093 07 16 W |
| Seymour Care Center | Hospital | 323 | Wayne | 40 41 04 N | 093 06 43 W |
| Seymour City Reservoir | Reservoir | 315 | Wayne | 40 40 12 N | 093 07 13 W |
| Seymour Fire Station | Hospital | 323 | Wayne | 40 40 57 N | 093 07 16 W |
| Seymour High School | School | 324 | Wayne | 40 40 51 N | 093 06 58 W |
| Seymour Lake Park | Park | 314 | Wayne | 40 40 10 N | 093 07 28 W |
| Seymour Medical Clinic | Hospital | 323 | Wayne | 40 40 58 N | 093 07 19 W |
| Seymour Post Office | Post Office | 325 | Wayne | 40 41 00 N | 093 07 11 W |
| Seymour Public Library | Building | 324 | Wayne | 40 40 56 N | 093 07 13 W |
| Seymour School (historical) | School | 187 | Clinton | 41 49 43 N | 090 14 52 W |
| Shabbona Post Office (historical) | Post Office | 444 | O'Brien | 42 56 30 N | 095 49 01 W |
| Shadle Memorial Library | Building | 282 | Marion | 41 23 16 N | 093 16 16 W |
| Shadle Park | Park | 272 | Marion | 41 23 20 N | 093 16 38 W |
| Shady Branch | Stream | | Boone | 41 58 51 N | 093 56 36 W |
| Shady Creek Recreation Area | Park | 168 | Muscatine | 41 26 50 N | 090 52 29 W |
| Shady Creek Recreation Area | Park | 168 | Scott | 41 26 52 N | 090 52 24 W |
| Shady Grove | Populated Place | 283 | Buchanan | 42 22 50 N | 092 03 18 W |
| Shady Grove Cemetery (historical) | Cemetery | 280 | Buchanan | 42 22 50 N | 092 03 21 W |
| Shady Grove Mobile Home Park | Populated Place | 280 | Story | 42 00 45 N | 093 34 11 W |
| Shady Grove Post Office (historical) | Post Office | 283 | Buchanan | 42 22 50 N | 092 03 18 W |
| Shady Grove School | Locale | 335 | Mills | 40 55 00 N | 095 42 36 W |
| Shady Haven Camper Park and Marina | Locale | 188 | Jackson | 42 14 41 N | 090 24 52 W |
| Shady Oak | Populated Place | 299 | Webster | 42 27 42 N | 094 09 25 W |
| Shady Oak (historical) | Locale | 299 | Webster | 42 27 42 N | 094 09 25 W |
| Shady Oak Post Office (historical) | Post Office | 299 | Webster | 42 27 42 N | 094 09 25 W |
| Shady Oaks Center | Hospital | 368 | Calhoun | 42 15 52 N | 094 45 03 W |
| Shady Oaks Golf Course | Locale | 281 | Warren | 41 22 25 N | 093 27 11 W |
| Shady Oaks RV Campground | Locale | 266 | Marshall | 42 00 42 N | 092 51 13 W |
| Shady Rest Care Center | Hospital | 252 | Dubuque | 42 18 08 N | 091 01 11 W |
| Shaeffer Cemetery | Cemetery | 289 | Appanoose | 40 50 02 N | 092 56 59 W |
| Shafer-Gear Cemetery | Cemetery | 340 | Boone | 42 10 30 N | 093 59 11 W |
| Shaffton | Populated Place | 182 | Clinton | 41 45 22 N | 090 19 55 W |
| Shaffton Cemetery | Cemetery | 201 | Clinton | 41 45 27 N | 090 20 40 W |
| Shagbark Hills Area | Park | 382 | Woodbury | 42 27 00 N | 095 46 56 W |
| Shaha Cemetery | Cemetery | 336 | Ringgold | 40 38 28 N | 094 08 21 W |
| Shambaugh | Populated Place | 300 | Page | 40 39 32 N | 095 01 55 W |
| Shambaugh (historical) | Locale | 308 | Page | 40 39 32 N | 095 02 21 W |
| Shambaugh Auditorium | Building | 199 | Johnson | 41 39 34 N | 091 32 18 W |
| Shambaugh Church of God | Church | 300 | Page | 40 39 32 N | 095 01 55 W |
| Shambaugh House | Building | 215 | Johnson | 41 39 59 N | 091 32 03 W |
| Shambaugh Post Office | Post Office | 300 | Page | 40 39 32 N | 095 01 55 W |
| Shambaugh Volunteer Fire Department | Building | 300 | Page | 40 39 32 N | 095 01 55 W |
| Shanghai Creek | Stream | | Adams | 41 06 58 N | 094 31 57 W |
| Shank Cemetery | Cemetery | 375 | Montgomery | 41 00 07 N | 095 11 31 W |
| Shank School | School | 239 | Wapello | 40 54 47 N | 092 21 07 W |
| Shannon City | Populated Place | 373 | Union | 40 54 06 N | 094 15 48 W |
| Shannon City (historical) | Locale | 352 | Union | 40 53 55 N | 094 15 41 W |
| Shannon City Post Office | Post Office | 373 | Union | 40 54 06 N | 094 15 48 W |
| Shannon Elementary School | School | 255 | Jones | 42 13 56 N | 091 11 33 W |
| Sharar Field | Airport | 194 | Des Moines | 41 02 00 N | 091 03 01 W |
| Sharbondy Park | Park | 489 | Osceola | 43 24 15 N | 095 38 37 W |
| Share Group Fellowship Church | Church | 352 | Calhoun | 42 16 15 N | 094 33 09 W |
| Shared Ministry of Rolfe Building | Church | 361 | Pocahontas | 42 48 54 N | 094 31 44 W |
| Sharon | Locale | 298 | Warren | 41 14 54 N | 093 34 56 W |
| Sharon | Populated Place | 400 | Audubon | 41 40 27 N | 094 59 44 W |
| Sharon | Populated Place | 216 | Lee | 40 43 35 N | 091 39 38 W |
| Sharon (historical) | Locale | 263 | Appanoose | 40 44 00 N | 092 48 51 W |
| Sharon Bethel Church | Church | 237 | Johnson | 41 33 19 N | 091 42 32 W |
| Sharon Bluffs State Park | Park | 281 | Appanoose | 40 43 14 N | 092 48 01 W |
| Sharon Cemetery | Cemetery | 256 | Appanoose | 40 44 00 N | 092 48 01 W |
| Sharon Cemetery | Cemetery | 281 | Appanoose | 40 41 45 N | 092 47 32 W |
| Sharon Cemetery | Cemetery | 230 | Cedar | 41 37 22 N | 091 01 35 W |
| Sharon Cemetery | Cemetery | 216 | Lee | 40 43 32 N | 091 39 41 W |
| Sharon Cemetery | Cemetery | 321 | Wayne | 40 52 47 N | 093 19 47 W |
| Sharon Center | Populated Place | 230 | Johnson | 41 34 09 N | 091 39 41 W |
| Sharon Center Post Office (historical) | Post Office | 230 | Johnson | 41 34 09 N | 091 39 41 W |
| Sharon Chapel | Church | 281 | Appanoose | 40 41 45 N | 092 47 32 W |
| Sharon Church | Church | 238 | Des Moines | 41 02 54 N | 091 14 10 W |
| Sharon Church | Church | 218 | Johnson | 41 32 26 N | 091 38 14 W |
| Sharon Church | Church | 232 | Johnson | 41 33 17 N | 091 39 19 W |
| Sharon Church | Church | 385 | Pottawattamie | 41 17 21 N | 095 28 47 W |
| Sharon Church | Church | 321 | Wayne | 40 52 48 N | 093 19 46 W |
| Sharon Hill Cemetery | Cemetery | 218 | Washington | 41 29 34 N | 091 42 27 W |
| Sharon Independent School (historical) | School | 234 | Cedar | 41 37 42 N | 091 02 09 W |
| Sharon Post Office (historical) | Post Office | 274 | Appanoose | 40 44 15 N | 092 48 51 W |
| Sharon Post Office (historical) | Post Office | 299 | Warren | 41 14 58 N | 093 34 58 W |
| Sharon Reformed Presbyterian Cemetery | Cemetery | 238 | Des Moines | 41 02 53 N | 091 14 11 W |
| Sharon United Cemetery | Cemetery | 231 | Johnson | 41 33 15 N | 091 39 22 W |
| Sharon United Methodist Church | Church | 240 | Linn | 41 57 38 N | 091 40 50 W |
| Sharon United Presbyterian Church | Church | 168 | Van Buren | 40 38 25 N | 091 44 35 W |
| Sharp Cemetery | Cemetery | 329 | Wayne | 40 41 30 N | 093 12 01 W |
| Sharps (historical) | Locale | 374 | Taylor | 40 47 40 N | 094 38 21 W |
| Sharpsburg | Populated Place | 389 | Taylor | 40 48 09 N | 094 38 33 W |
| Sharpsburg (historical) | Locale | 389 | Taylor | 40 48 05 N | 094 38 29 W |
| Sharpsburg Post Office | Post Office | 389 | Taylor | 40 48 09 N | 094 38 33 W |
| Sharpsburgh Post Office (historical) | Post Office | 292 | Mills | 41 00 07 N | 095 51 50 W |
| Shaul Cemetery | Cemetery | 235 | Wapello | 40 59 43 N | 092 26 58 W |
| Shaver Park | Park | 248 | Linn | 42 00 12 N | 091 40 27 W |
| Shawnee Creek | Stream | | Henry | 41 08 14 N | 091 43 03 W |
| Shawnee Park | Park | 238 | Linn | 41 59 00 N | 091 41 51 W |
| Shawondasse | Populated Place | 197 | Dubuque | 42 26 22 N | 090 35 29 W |
| Shawver Cemetery | Cemetery | 235 | Cedar | 41 47 16 N | 091 17 16 W |
| Sheaffer Memorial Golf Park | Locale | 208 | Lee | 40 41 45 N | 091 18 56 W |
| Sheaffer Park | Park | 220 | Henry | 40 57 43 N | 091 32 41 W |
| Sheaffer Park | Park | 198 | Lee | 40 38 36 N | 091 18 05 W |
| Sheaffer-Trieschmann Hall | Building | 217 | Henry | 40 58 25 N | 091 33 26 W |
| Sheakley Park | Park | 347 | Chickasaw | 43 03 20 N | 092 19 31 W |
| Shear Elevator | Locale | 316 | Butler | 42 46 26 N | 092 54 27 W |
| Shearer Cemetery | Cemetery | 344 | Page | 40 36 14 N | 094 56 18 W |
| Shearin Park | Park | 297 | Grundy | 42 21 10 N | 092 42 38 W |
| Sheeder Prairie State Preserve | Park | 374 | Guthrie | 41 41 25 N | 094 35 16 W |
| Sheepshead Bay | Bay | 178 | Jackson | 42 06 11 N | 090 09 59 W |
| Sheffield | Locale | 328 | Franklin | 42 53 40 N | 093 12 43 W |
| Sheffield | Locale | 302 | Story | 42 08 15 N | 093 33 18 W |
| Sheffield | Populated Place | 328 | Franklin | 42 53 36 N | 093 12 55 W |
| Sheffield (historical) | Locale | 313 | Dubuque | 42 21 15 N | 091 06 29 W |