Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Stimes Forest County Park | Park | 383 | Worth | 43 25 33 N | 093 15 51 W |
| Stimsons (historical) | Locale | 366 | Calhoun | 42 21 15 N | 094 36 01 W |
| Stimsons (historical) | Populated Place | 366 | Calhoun | 42 21 15 N | 094 36 01 W |
| Stinson Prairie State Park | Park | 370 | Kossuth | 43 02 50 N | 094 19 41 W |
| Stock School Cemetery | Cemetery | 290 | Clayton | 42 46 10 N | 091 11 00 W |
| Stockade Protection from Indians Historical Marker | Park | 451 | Dickinson | 43 25 20 N | 095 06 09 W |
| Stockade to Protect Pioneers Historical Marker | Park | 368 | Kossuth | 43 04 07 N | 094 14 09 W |
| Stockport | Populated Place | 229 | Van Buren | 40 51 27 N | 091 50 07 W |
| Stockport (historical) | Locale | 229 | Van Buren | 40 51 28 N | 091 49 56 W |
| Stockport City Hall | Building | 229 | Van Buren | 40 51 23 N | 091 49 60 W |
| Stockport Elevator | Locale | 229 | Van Buren | 40 51 25 N | 091 50 03 W |
| Stockport Fire Department | Building | 229 | Van Buren | 40 51 25 N | 091 50 03 W |
| Stockport Medical Clinic | Hospital | 229 | Van Buren | 40 51 25 N | 091 50 03 W |
| Stockport Methodist Church | Church | 229 | Van Buren | 40 51 30 N | 091 49 60 W |
| Stockport Post Office | Post Office | 229 | Van Buren | 40 51 25 N | 091 50 03 W |
| Stockport Public Library | Building | 229 | Van Buren | 40 51 19 N | 091 50 06 W |
| Stockton | Locale | 221 | Muscatine | 41 35 31 N | 090 51 33 W |
| Stockton | Populated Place | 222 | Muscatine | 41 35 29 N | 090 51 32 W |
| Stockton Baptist Church | Church | 218 | Muscatine | 41 35 26 N | 090 51 36 W |
| Stockton Consolidated School (historical) | School | 230 | Muscatine | 41 35 23 N | 090 51 09 W |
| Stockton Post Office | Post Office | 222 | Muscatine | 41 35 29 N | 090 51 32 W |
| Stoddard School | School | 343 | Hardin | 42 31 46 N | 093 15 57 W |
| Stoe Creek | Stream | | Fayette | 42 45 38 N | 092 04 03 W |
| Stoe Creek Bridge | Bridge | 332 | Fayette | 42 48 08 N | 091 59 16 W |
| Stoehr County Park | Park | 324 | Grundy | 42 23 40 N | 092 53 05 W |
| Stoen Farm Cemetery | Cemetery | 336 | Winneshiek | 43 25 60 N | 091 39 31 W |
| Stoermer Cemetery | Cemetery | 224 | Keokuk | 41 20 00 N | 092 08 01 W |
| Stofferan Creek | Stream | | O'Brien | 43 04 12 N | 095 50 00 W |
| Stogdill Chiropractic Center | Hospital | 265 | Davis | 40 45 07 N | 092 24 51 W |
| Stolley Gravel Pit Park | Park | 401 | Clay | 43 09 10 N | 095 11 21 W |
| Stoltz Addition Park | Park | 324 | Chickasaw | 43 01 30 N | 092 24 11 W |
| Stoltz Park | Park | 347 | Chickasaw | 43 03 29 N | 092 18 40 W |
| Stoltz Sports Center | Building | 268 | Dubuque | 42 29 52 N | 090 41 37 W |
| Stonbrook Community Church | Church | 292 | Story | 42 03 24 N | 093 38 17 W |
| Stone Academy (historical) | School | 242 | Johnson | 41 50 11 N | 091 29 60 W |
| Stone Beach Gardner Cabin | Building | 434 | Dickinson | 43 21 48 N | 095 08 11 W |
| Stone City | Populated Place | 250 | Jones | 42 06 50 N | 091 20 58 W |
| Stone City (historical) | Locale | 250 | Jones | 42 06 50 N | 091 20 58 W |
| Stone City Post Office (historical) | Post Office | 250 | Jones | 42 06 50 N | 091 20 58 W |
| Stone Creek Family Dental Clinic | Hospital | 355 | Cerro Gordo | 43 08 56 N | 093 14 46 W |
| Stone Lake | Lake | 167 | Louisa | 41 09 13 N | 091 07 26 W |
| Stone Park | Park | 244 | Polk | 41 34 08 N | 093 36 27 W |
| Stone School (historical) | School | 208 | Allamakee | 43 21 42 N | 091 13 17 W |
| Stone School (historical) | School | 228 | Scott | 41 36 43 N | 090 23 55 W |
| Stone School Cemetery | Cemetery | 268 | Clayton | 42 48 14 N | 091 33 03 W |
| Stone State Park | Park | 369 | Woodbury | 42 32 56 N | 096 28 00 W |
| Stone-Tree Cemetery | Cemetery | 223 | Van Buren | 40 48 20 N | 091 47 21 W |
| Stone's Plantation | Locale | 293 | Clayton | 42 44 20 N | 091 29 51 W |
| Stonega | Locale | 357 | Hamilton | 42 28 36 N | 093 42 53 W |
| Stonega | Populated Place | 357 | Hamilton | 42 28 36 N | 093 42 53 W |
| Stonehill Care Center | Hospital | 231 | Dubuque | 42 31 50 N | 090 40 10 W |
| Stoneking Cemetery | Cemetery | 298 | Lucas | 41 05 47 N | 093 07 04 W |
| Stoner House | Building | 270 | Linn | 41 55 30 N | 091 25 19 W |
| Stoneridge Post Office (historical) | Post Office | 227 | Mahaska | 41 23 30 N | 092 27 31 W |
| Stoney Point | Cape | 426 | Dickinson | 43 23 35 N | 095 05 19 W |
| Stony Creek | Stream | | Clay | 43 08 30 N | 095 14 59 W |
| Stony Creek | Stream | | Poweshiek | 41 44 38 N | 092 27 02 W |
| Stony Creek | Stream | | Warren | 41 10 46 N | 093 22 06 W |
| Stony Lake | Lake | 436 | Dickinson | 43 21 53 N | 095 21 27 W |
| Stookesberry Cemetery | Cemetery | 222 | Van Buren | 40 39 30 N | 092 10 01 W |
| Storks Ditch | Canal | 347 | Kossuth | 43 17 24 N | 094 07 24 W |
| Storm Creek | Stream | | Carroll | 42 02 55 N | 094 46 05 W |
| Storm Creek Bridge | Bridge | 366 | Carroll | 42 06 08 N | 094 48 15 W |
| Storm Creek Bridge Two | Bridge | 363 | Carroll | 42 04 43 N | 094 46 50 W |
| Storm Lake | Lake | 427 | Buena Vista | 42 37 38 N | 095 12 12 W |
| Storm Lake | Locale | 437 | Buena Vista | 42 38 35 N | 095 12 07 W |
| Storm Lake | Populated Place | 433 | Buena Vista | 42 38 28 N | 095 12 35 W |
| Storm Lake Chiropractic Clinic | Hospital | 436 | Buena Vista | 42 38 41 N | 095 12 16 W |
| Storm Lake City Fire Station | Building | 436 | Buena Vista | 42 38 55 N | 095 11 45 W |
| Storm Lake City Hall | Building | 437 | Buena Vista | 42 38 43 N | 095 11 60 W |
| Storm Lake Golf Course | Locale | 433 | Buena Vista | 42 37 55 N | 095 10 21 W |
| Storm Lake High School | School | 439 | Buena Vista | 42 38 55 N | 095 11 33 W |
| Storm Lake Laketrail | Trail | 433 | Buena Vista | 42 38 17 N | 095 12 16 W |
| Storm Lake Manor | Hospital | 433 | Buena Vista | 42 39 19 N | 095 11 60 W |
| Storm Lake Middle School | School | 434 | Buena Vista | 42 38 54 N | 095 13 39 W |
| Storm Lake Municipal Airport | Airport | 450 | Buena Vista | 42 35 52 N | 095 14 26 W |
| Storm Lake Municipal Cemetery | Cemetery | 436 | Buena Vista | 42 38 07 N | 095 10 29 W |
| Storm Lake Police Department | Building | 436 | Buena Vista | 42 38 48 N | 095 11 60 W |
| Storm Lake Post Office | Post Office | 438 | Buena Vista | 42 38 35 N | 095 11 52 W |
| Storm Lake Public Library | Building | 437 | Buena Vista | 42 38 42 N | 095 11 52 W |
| Storm Lake Sheriff's Office | Building | 437 | Buena Vista | 42 38 42 N | 095 11 56 W |
| Storm Lake State Wildlife Management Area | Park | 427 | Buena Vista | 42 37 59 N | 095 12 35 W |
| Storre Theatre | Building | 267 | Winneshiek | 43 18 46 N | 091 48 29 W |
| Storre Wildlife Area | Park | 370 | Worth | 43 15 25 N | 093 26 11 W |
| Story Center Historical Museum | Building | 281 | Story | 42 01 32 N | 093 36 44 W |
| Story City | Locale | 309 | Story | 42 11 20 N | 093 36 01 W |
| Story City | Populated Place | 306 | Story | 42 11 14 N | 093 35 45 W |
| Story City City Hall | Building | 307 | Story | 42 11 13 N | 093 35 48 W |
| Story City Evangelical Free Church | Church | 312 | Story | 42 09 59 N | 093 30 07 W |
| Story City Fire Department | Building | 307 | Story | 42 11 13 N | 093 35 48 W |
| Story City Library | Building | 307 | Story | 42 11 15 N | 093 35 49 W |
| Story City North Bound Rest Area | Locale | 306 | Story | 42 07 42 N | 093 33 11 W |
| Story City Police Department | Building | 307 | Story | 42 11 13 N | 093 35 48 W |
| Story City Post Office | Post Office | 305 | Story | 42 11 15 N | 093 35 41 W |
| Story City South Bound Rest Area | Locale | 309 | Story | 42 06 36 N | 093 33 26 W |
| Story County | Civil | 304 | Story | 42 02 00 N | 093 28 01 W |
| Story County Conservation Center | Building | 312 | Story | 42 05 50 N | 093 34 01 W |
| Story County Courthouse | Building | 301 | Story | 42 01 12 N | 093 27 11 W |
| Story County Home | Building | 299 | Story | 42 02 52 N | 093 29 18 W |
| Story County Hospital | Hospital | 303 | Story | 42 01 02 N | 093 27 10 W |
| Story County Sheriffs Office | Building | 301 | Story | 42 01 12 N | 093 27 11 W |
| Stotts Cemetery | Cemetery | 276 | Marion | 41 10 19 N | 093 07 38 W |
| Stotts Landing Field | Airport | 357 | Boone | 42 08 55 N | 093 52 32 W |
| Stouffer Memorial Wildlife Preserve | Park | 396 | Clay | 43 08 10 N | 095 05 01 W |
| Stout | Populated Place | 311 | Grundy | 42 31 35 N | 092 42 43 W |
| Stout (historical) | Locale | 314 | Grundy | 42 31 25 N | 092 42 44 W |
| Stout City Hall | Building | 311 | Grundy | 42 31 35 N | 092 42 43 W |
| Stout Post Office | Post Office | 311 | Grundy | 42 31 35 N | 092 42 43 W |
| Stover Heights Community | Populated Place | 271 | Polk | 41 38 20 N | 093 33 31 W |
| Stover Memorial Church | Church | 260 | Polk | 41 37 60 N | 093 37 33 W |