Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Worth County Courthouse | Building | 375 | Worth | 43 26 40 N | 093 13 04 W |
| Worth County Historical Museum | Building | 375 | Worth | 43 26 38 N | 093 13 07 W |
| Worth County Lake Park | Park | 359 | Worth | 43 22 12 N | 093 10 39 W |
| Worth County Sheriffs Office | Building | 375 | Worth | 43 26 40 N | 093 13 04 W |
| Worth Post Office (historical) | Post Office | 329 | Boone | 41 57 52 N | 093 50 02 W |
| Worth State Game Farm | Park | 318 | Boone | 41 58 52 N | 093 53 21 W |
| Worthing Cemetery | Cemetery | 329 | Madison | 41 13 09 N | 093 48 35 W |
| Worthington | Populated Place | 280 | Dubuque | 42 23 47 N | 091 07 12 W |
| Worthington (historical) | Locale | 276 | Dubuque | 42 23 44 N | 091 07 26 W |
| Worthington Acres | Populated Place | 246 | Linn | 41 55 46 N | 091 37 42 W |
| Worthington Baptist Cemetery (historical) | Cemetery | 276 | Dubuque | 42 23 55 N | 091 07 11 W |
| Worthington Cemetery | Cemetery | 335 | Madison | 41 25 42 N | 094 05 26 W |
| Worthington Church | Church | 330 | Madison | 41 25 42 N | 094 05 29 W |
| Worthington City Hall | Building | 278 | Dubuque | 42 23 51 N | 091 07 12 W |
| Worthington Memorial Hall | Building | 278 | Dubuque | 42 23 55 N | 091 06 59 W |
| Worthington Park | Park | 344 | Humboldt | 42 42 50 N | 094 13 34 W |
| Worthington Post Office | Post Office | 281 | Dubuque | 42 23 47 N | 091 07 06 W |
| Wregie Memorial Library | Building | 224 | Jones | 41 59 02 N | 090 57 21 W |
| Wren | Populated Place | 349 | Plymouth | 42 38 44 N | 096 17 11 W |
| Wren Cemetery | Cemetery | 255 | Marion | 41 22 23 N | 093 09 11 W |
| Wren Hill Cemetery | Cemetery | 292 | Lucas | 41 05 30 N | 093 31 41 W |
| Wren School | School | 316 | Lucas | 41 05 19 N | 093 31 33 W |
| Wright | Populated Place | 258 | Mahaska | 41 14 57 N | 092 31 34 W |
| Wright (historical) | Locale | 258 | Mahaska | 41 14 58 N | 092 31 34 W |
| Wright Cemetery | Cemetery | 287 | Benton | 41 54 49 N | 092 15 53 W |
| Wright Cemetery | Cemetery | 240 | Cedar | 41 45 25 N | 091 02 08 W |
| Wright Cemetery | Cemetery | 329 | Greene | 42 01 22 N | 094 26 53 W |
| Wright Cemetery | Cemetery | 229 | Jefferson | 40 57 10 N | 091 52 22 W |
| Wright Cemetery | Cemetery | 180 | Van Buren | 40 38 26 N | 091 45 15 W |
| Wright Church | Church | 354 | Wright | 42 51 47 N | 093 49 36 W |
| Wright City Christian Reform Cemetery | Cemetery | 354 | Wright | 42 51 46 N | 093 49 33 W |
| Wright Community Church | Church | 258 | Mahaska | 41 14 55 N | 092 31 36 W |
| Wright County | Civil | 360 | Wright | 42 44 00 N | 093 43 01 W |
| Wright County Burying Grounds | Cemetery | 348 | Wright | 42 43 30 N | 093 55 16 W |
| Wright County Courthouse | Building | 357 | Wright | 42 43 57 N | 093 43 56 W |
| Wright County Sheriffs Office | Building | 355 | Wright | 42 43 34 N | 093 44 06 W |
| Wright Elementary School | School | 280 | Polk | 41 32 22 N | 093 38 04 W |
| Wright Hall | Building | 283 | Black Hawk | 42 30 50 N | 092 27 32 W |
| Wright Post Office (historical) | Post Office | 258 | Mahaska | 41 14 57 N | 092 31 34 W |
| Wright School | School | 244 | Linn | 42 01 04 N | 091 39 31 W |
| Wright Wildlife Area | Park | 361 | Adair | 41 22 15 N | 094 16 31 W |
| WSUI-AM (Iowa City) | Tower | 206 | Johnson | 41 39 45 N | 091 34 31 W |
| Wulfsberg Tennis Courts | Park | 266 | Winneshiek | 43 18 46 N | 091 48 31 W |
| Wurth Chiropractic Clinic | Hospital | 440 | O'Brien | 42 58 16 N | 095 29 58 W |
| Wyalusing Slough | Channel | 186 | Clayton | 42 55 57 N | 091 09 43 W |
| Wyant Spinal Clinic | Hospital | 349 | Monona | 42 09 58 N | 095 47 31 W |
| Wyatt Earp House | Building | 269 | Marion | 41 24 23 N | 092 54 51 W |
| Wykerts Cemetery | Cemetery | 200 | Des Moines | 40 51 50 N | 091 07 51 W |
| Wyman | Populated Place | 221 | Louisa | 41 11 32 N | 091 28 27 W |
| Wyman (historical) | Locale | 222 | Louisa | 41 11 30 N | 091 28 36 W |
| Wyman Grain Company Elevator | Locale | 222 | Washington | 41 12 50 N | 091 32 19 W |
| Wyman Post Office (historical) | Post Office | 221 | Louisa | 41 11 32 N | 091 28 27 W |
| Wymore Cemetery | Cemetery | 245 | Mahaska | 41 21 00 N | 092 30 26 W |
| Wymore Church | Church | 245 | Mahaska | 41 21 04 N | 092 30 28 W |
| Wyoming | Populated Place | 249 | Jones | 42 03 33 N | 091 00 27 W |
| Wyoming (historical) | Locale | 249 | Jones | 42 03 35 N | 091 00 16 W |
| Wyoming Cemetery | Cemetery | 274 | Jones | 42 03 51 N | 091 00 55 W |
| Wyoming City Hall | Building | 250 | Jones | 42 03 31 N | 091 00 24 W |
| Wyoming Fire Department | Building | 252 | Jones | 42 03 34 N | 090 59 59 W |
| Wyoming Historical Museum | Building | 250 | Jones | 42 03 31 N | 091 00 24 W |
| Wyoming Library | Building | 250 | Jones | 42 03 31 N | 091 00 24 W |
| Wyoming Post Office | Post Office | 249 | Jones | 42 03 31 N | 091 00 19 W |
| Wyoming Slough | Stream | | Muscatine | 41 26 24 N | 090 59 39 W |
| Xavier High School | School | 234 | Linn | 42 01 22 N | 091 43 20 W |
| Xenia | Populated Place | 313 | Dallas | 41 51 25 N | 093 53 36 W |
| Xenia | Populated Place | 295 | Hardin | 42 18 40 N | 093 04 51 W |
| Xenia Cemetery | Cemetery | 312 | Dallas | 41 51 11 N | 093 53 21 W |
| Xenia Cemetery | Cemetery | 293 | Hardin | 42 18 43 N | 093 04 42 W |
| Xenia Post Office (historical) | Post Office | 288 | Hardin | 42 18 40 N | 093 04 19 W |
| Y Park | Park | 256 | Black Hawk | 42 28 12 N | 092 17 14 W |
| Y Park | Park | 250 | Jones | 42 13 41 N | 091 11 21 W |
| Y's Motel and Campground | Locale | 330 | Hardin | 42 33 25 N | 093 02 31 W |
| Yager Slough State Game Management Area | Park | 443 | Dickinson | 43 23 26 N | 095 17 35 W |
| Yagyavalkya Learning Center | Building | 229 | Jefferson | 41 01 04 N | 091 58 02 W |
| Yale | Populated Place | 342 | Guthrie | 41 46 36 N | 094 21 29 W |
| Yale (historical) | Locale | 342 | Guthrie | 41 46 30 N | 094 21 11 W |
| Yale Cemetery | Cemetery | 348 | Guthrie | 41 46 07 N | 094 21 31 W |
| Yale City Hall | Building | 342 | Guthrie | 41 46 30 N | 094 21 26 W |
| Yale Post Office | Post Office | 342 | Guthrie | 41 46 30 N | 094 21 26 W |
| Yale School | School | 356 | Madison | 41 15 57 N | 094 05 24 W |
| Yalton | Locale | 204 | Washington | 41 27 36 N | 091 32 32 W |
| Yampa | Populated Place | 230 | Wapello | 41 00 36 N | 092 13 26 W |
| Yampa Post Office (historical) | Post Office | 236 | Wapello | 41 00 10 N | 092 14 16 W |
| Yankee Cemetery | Cemetery | 343 | Chickasaw | 43 09 20 N | 092 14 17 W |
| Yankee Grove Post Office (historical) | Post Office | 235 | Cedar | 41 52 55 N | 091 20 33 W |
| Yankee Point Cemetery | Cemetery | 242 | Iowa | 41 33 00 N | 092 01 05 W |
| Yankee Post Office (historical) | Post Office | 429 | Clay | 43 00 36 N | 095 19 41 W |
| Yankee Run | Stream | | Clinton | 41 48 37 N | 090 48 45 W |
| Yarmouth | Populated Place | 246 | Des Moines | 41 01 35 N | 091 19 25 W |
| Yarmouth (historical) | Locale | 247 | Des Moines | 41 01 40 N | 091 19 17 W |
| Yarmouth Community Congregational Church | Church | 246 | Des Moines | 41 01 35 N | 091 19 25 W |
| Yarmouth Post Office | Post Office | 246 | Des Moines | 41 01 35 N | 091 19 25 W |
| Yatton (historical) | Populated Place | 198 | Washington | 41 27 49 N | 091 35 02 W |
| Yatton Post Office (historical) | Post Office | 193 | Washington | 41 28 05 N | 091 34 51 W |
| Yazoo Post Office (historical) | Post Office | 307 | Harrison | 41 33 31 N | 096 00 02 W |
| Yeader Creek | Stream | | Polk | 41 33 06 N | 093 31 41 W |
| Yeader Creek Park | Park | 265 | Polk | 41 32 28 N | 093 33 47 W |
| Yeager Creek | Stream | | Jackson | 42 19 52 N | 090 25 50 W |
| Yeager Lake | Lake | 155 | Des Moines | 40 49 59 N | 091 05 34 W |
| Yellow River | Populated Place | 201 | Allamakee | 43 05 16 N | 091 11 16 W |
| Yellow River | Stream | | Allamakee | 43 05 12 N | 091 10 51 W |
| Yellow River State Forest | Park | 258 | Allamakee | 43 09 18 N | 091 14 36 W |
| Yellow River State Forest Trail | Trail | 211 | Allamakee | 43 10 23 N | 091 13 12 W |
| Yellow Smoke Park | Park | 407 | Crawford | 42 01 50 N | 095 19 21 W |
| Yellow Smoke Park Bridge | Bridge | 407 | Crawford | 42 01 50 N | 095 19 21 W |
| Yellow Smoke Park Campgrounds | Locale | 407 | Crawford | 42 01 50 N | 095 19 21 W |
| Yellow Spring Creek | Stream | | Des Moines | 40 53 13 N | 091 02 01 W |
| Yellow Spring Creek Bridge | Bridge | 209 | Des Moines | 40 57 55 N | 091 06 31 W |
| Yellowthroat Wildlife Area | Park | 404 | Clay | 43 11 10 N | 095 11 46 W |
| Yeomans | Populated Place | 413 | Plymouth | 42 35 05 N | 096 24 54 W |