Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Plum Grove Cemetery | Cemetery | 268 | Benton | 42 09 00 N | 091 58 21 W |
| Plum Grove Historic Home | Building | 208 | Johnson | 41 38 49 N | 091 31 29 W |
| Plum Post Office (historical) | Post Office | 427 | Buena Vista | 42 42 40 N | 095 11 31 W |
| Plum River Golf Course | Locale | 208 | Jackson | 42 04 30 N | 090 25 20 W |
| Plum Thicket Cemetery | Cemetery | 352 | Page | 40 53 30 N | 095 12 21 W |
| Plumer Cemetery | Cemetery | 388 | Mills | 41 09 20 N | 095 45 43 W |
| Plunger Creek | Stream | | Adair | 41 25 30 N | 094 15 15 W |
| Plymouth | Locale | 344 | Cerro Gordo | 43 14 41 N | 093 07 18 W |
| Plymouth | Populated Place | 346 | Cerro Gordo | 43 14 45 N | 093 07 23 W |
| Plymouth | Populated Place | 174 | Van Buren | 40 39 12 N | 091 44 43 W |
| Plymouth (historical) | Populated Place | 363 | Plymouth | 42 43 56 N | 096 12 31 W |
| Plymouth Brethren Bible Chapel | Church | 201 | Wapello | 40 59 57 N | 092 26 02 W |
| Plymouth Brethren Gospel Chapel | Church | 417 | Adair | 41 18 20 N | 094 27 21 W |
| Plymouth Brethren Gospel Hall | Church | 288 | Delaware | 42 29 34 N | 091 27 23 W |
| Plymouth Brethren Gospel Hall | Church | 311 | Grundy | 42 31 35 N | 092 42 43 W |
| Plymouth Centre Post Office (historical) | Post Office | 363 | Plymouth | 42 43 56 N | 096 12 31 W |
| Plymouth City Hall | Building | 346 | Cerro Gordo | 43 14 45 N | 093 07 21 W |
| Plymouth Congergational United Church | Church | 198 | Wapello | 41 00 08 N | 092 25 22 W |
| Plymouth Congregational Church | Church | 298 | Polk | 41 35 09 N | 093 40 25 W |
| Plymouth County | Civil | 359 | Plymouth | 42 44 00 N | 096 14 01 W |
| Plymouth County Courthouse | Building | 384 | Plymouth | 42 47 24 N | 096 09 40 W |
| Plymouth County Fairgrounds | Locale | 373 | Plymouth | 42 48 00 N | 096 09 31 W |
| Plymouth County Home | Locale | 378 | Plymouth | 42 48 00 N | 096 08 45 W |
| Plymouth County Museum | Building | 376 | Plymouth | 42 47 20 N | 096 10 06 W |
| Plymouth county Sheriffs Office | Building | 384 | Plymouth | 42 47 24 N | 096 09 41 W |
| Plymouth Creek | Stream | | Plymouth | 42 44 15 N | 096 12 35 W |
| Plymouth Feeds Company Elevator | Locale | 358 | Plymouth | 42 43 11 N | 096 14 55 W |
| Plymouth Fire Department | Building | 346 | Cerro Gordo | 43 14 45 N | 093 07 23 W |
| Plymouth Junction | Populated Place | 349 | Cerro Gordo | 43 13 39 N | 093 07 51 W |
| Plymouth Manor Care Center | Hospital | 404 | Plymouth | 42 46 53 N | 096 09 16 W |
| Plymouth Pits Wildlife Area | Park | 345 | Worth | 43 15 20 N | 093 07 01 W |
| Plymouth Post Office | Post Office | 346 | Cerro Gordo | 43 14 45 N | 093 07 21 W |
| Plymouth Presbyterian Cemetery | Cemetery | 436 | Plymouth | 42 49 15 N | 096 19 53 W |
| Plymouth Road Bible Church | Church | 344 | Cerro Gordo | 43 14 50 N | 093 07 25 W |
| Plymouth Rock | Locale | 315 | Winneshiek | 43 26 03 N | 091 59 57 W |
| Plymouth Rock Post Office (historical) | Post Office | 315 | Winneshiek | 43 26 03 N | 091 59 57 W |
| Plymton School | School | 275 | Lucas | 41 03 30 N | 093 25 23 W |
| PM Odd Fellows Park | Park | 375 | Cerro Gordo | 43 06 60 N | 093 25 11 W |
| Pocahontas | Populated Place | 372 | Pocahontas | 42 44 08 N | 094 40 09 W |
| Pocahontas (historical) | Locale | 372 | Pocahontas | 42 43 55 N | 094 40 02 W |
| Pocahontas Area Elementary School | School | 374 | Pocahontas | 42 43 56 N | 094 40 22 W |
| Pocahontas Area High School | School | 372 | Pocahontas | 42 44 02 N | 094 40 26 W |
| Pocahontas Area School | School | 360 | Pocahontas | 42 48 58 N | 094 31 48 W |
| Pocahontas Catholic Grade School | School | 377 | Pocahontas | 42 43 43 N | 094 40 30 W |
| Pocahontas City Hall | Building | 372 | Pocahontas | 42 43 57 N | 094 40 11 W |
| Pocahontas City Police Department | Building | 372 | Pocahontas | 42 43 57 N | 094 40 11 W |
| Pocahontas Community Hospital | Hospital | 375 | Pocahontas | 42 44 27 N | 094 40 41 W |
| Pocahontas County | Civil | 372 | Pocahontas | 42 44 00 N | 094 40 01 W |
| Pocahontas County Courthouse | Building | 372 | Pocahontas | 42 44 14 N | 094 40 08 W |
| Pocahontas County Fairgrounds | Locale | 371 | Pocahontas | 42 44 12 N | 094 39 55 W |
| Pocahontas County Sheriff Department | Building | 372 | Pocahontas | 42 44 12 N | 094 40 10 W |
| Pocahontas Fire Department | Building | 372 | Pocahontas | 42 44 14 N | 094 40 08 W |
| Pocahontas Golf Club | Locale | 371 | Pocahontas | 42 44 25 N | 094 39 06 W |
| Pocahontas Manor Care Center | Hospital | 374 | Pocahontas | 42 44 31 N | 094 40 41 W |
| Pocahontas Municipal Airport | Airport | 373 | Pocahontas | 42 44 34 N | 094 38 49 W |
| Pocahontas Point | Cape | 428 | Dickinson | 43 21 17 N | 095 09 39 W |
| Pocahontas Post Office | Post Office | 372 | Pocahontas | 42 44 12 N | 094 40 09 W |
| Pocahontas Public Library | Building | 372 | Pocahontas | 42 44 04 N | 094 40 10 W |
| Pocahontas Regular Baptist Church | Church | 374 | Pocahontas | 42 44 24 N | 094 40 41 W |
| Pocahontas Statue | Park | 372 | Pocahontas | 42 43 59 N | 094 39 31 W |
| Poe Chapel | Church | 230 | Linn | 41 59 10 N | 091 39 26 W |
| Poe Hollow County Park | Park | 332 | Ringgold | 40 42 45 N | 094 12 01 W |
| Point Ann | Cliff | 200 | Clayton | 43 01 16 N | 091 10 17 W |
| Point Ann Cemetery | Cemetery | 278 | Clayton | 43 01 17 N | 091 11 00 W |
| Point Hollow | Valley | | Dubuque | 42 37 37 N | 091 06 58 W |
| Point Isabel Cemetery | Cemetery | 256 | Wapello | 40 55 33 N | 092 27 43 W |
| Point Isabelle Post Office (historical) | Post Office | 260 | Wapello | 40 55 20 N | 092 27 44 W |
| Point of Grace Church | Church | 256 | Polk | 41 35 28 N | 093 42 55 W |
| Point Palestine Post Office (historical) | Post Office | 306 | Story | 41 54 25 N | 093 36 34 W |
| Point Pleasant | Locale | 337 | Hardin | 42 21 00 N | 093 13 56 W |
| Point Pleasant Cemetery | Cemetery | 336 | Hardin | 42 20 32 N | 093 13 53 W |
| Point Pleasant Post Office (historical) | Post Office | 337 | Hardin | 42 21 00 N | 093 13 56 W |
| Point Pleasant Post Office (historical) | Post Office | 190 | Scott | 41 45 47 N | 090 37 35 W |
| Poker Rock | Pillar | 217 | Jones | 42 09 36 N | 090 54 01 W |
| Poland Cemetery | Cemetery | 420 | Buena Vista | 42 51 40 N | 094 59 31 W |
| Polands Grove Post Office (historical) | Post Office | 348 | Hamilton | 42 24 20 N | 093 43 41 W |
| Polecat Creek | Stream | | Boone | 42 01 30 N | 093 54 24 W |
| Polen | Populated Place | 380 | Ringgold | 40 53 06 N | 094 23 46 W |
| Polen Post Office (historical) | Post Office | 380 | Ringgold | 40 53 06 N | 094 23 46 W |
| Policemans Park | Park | 262 | Black Hawk | 42 32 30 N | 092 26 05 W |
| Poling Honor House | Building | 267 | Marion | 41 24 12 N | 092 55 09 W |
| Polishville Cemetery | Cemetery | 219 | Jefferson | 41 06 42 N | 091 48 48 W |
| Polk City | Populated Place | 269 | Polk | 41 46 17 N | 093 42 47 W |
| Polk City (historical) | Locale | 269 | Polk | 41 46 17 N | 093 42 47 W |
| Polk City Cemetery | Cemetery | 267 | Polk | 41 46 22 N | 093 42 11 W |
| Polk City City Hall | Building | 271 | Polk | 41 46 19 N | 093 42 52 W |
| Polk City Community Library | Building | 290 | Polk | 41 46 20 N | 093 43 11 W |
| Polk City Fire Station | Building | 271 | Polk | 41 46 19 N | 093 42 52 W |
| Polk City Junction | Populated Place | 291 | Polk | 41 48 09 N | 093 41 53 W |
| Polk City Police Station | Building | 274 | Polk | 41 46 16 N | 093 42 53 W |
| Polk City Post Office | Post Office | 269 | Polk | 41 46 19 N | 093 42 49 W |
| Polk County | Civil | 280 | Polk | 41 41 00 N | 093 35 01 W |
| Polk County Courthouse | Building | 244 | Polk | 41 35 04 N | 093 37 25 W |
| Polk County Home | Building | 290 | Polk | 41 40 13 N | 093 36 01 W |
| Polk School | School | 226 | Linn | 41 59 27 N | 091 39 13 W |
| Polk Township Wildlife Area | Park | 278 | Benton | 42 16 60 N | 091 56 51 W |
| Pollard Cemetery | Cemetery | 265 | Davis | 40 43 39 N | 092 28 07 W |
| Pollimer Park Lake | Reservoir | 214 | Lee | 40 42 45 N | 091 26 08 W |
| Pollimer Park Lake Dam | Dam | 214 | Lee | 40 42 45 N | 091 26 08 W |
| Pollmiller Park Trail | Trail | 216 | Lee | 40 42 50 N | 091 26 06 W |
| Poma | Locale | 386 | Shelby | 41 46 44 N | 095 27 06 W |
| Pomerantz Family Pavilion | Building | 219 | Johnson | 41 39 30 N | 091 32 51 W |
| Pomeroy | Locale | 378 | Calhoun | 42 33 05 N | 094 41 02 W |
| Pomeroy | Populated Place | 378 | Calhoun | 42 33 04 N | 094 41 02 W |
| Pomeroy Care Center | Hospital | 378 | Calhoun | 42 32 36 N | 094 40 50 W |
| Pomeroy City Hall | Building | 377 | Calhoun | 42 33 02 N | 094 41 06 W |
| Pomeroy Post Office | Post Office | 377 | Calhoun | 42 33 03 N | 094 41 08 W |
| Pomeroy Public Library | Building | 378 | Calhoun | 42 33 08 N | 094 41 04 W |
| Pomeroy-Palmer Community School | School | 375 | Calhoun | 42 32 47 N | 094 40 56 W |
| Pomme de Terre Prairie | Flat | 180 | Clinton | 41 57 58 N | 090 11 10 W |