Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Petersville Post Office (historical) | Post Office | 344 | Union | 41 00 20 N | 094 07 01 W |
| Petes Patch Airport | Airport | 276 | Linn | 42 08 05 N | 091 35 01 W |
| Petes Pond | Lake | 401 | Clay | 43 08 14 N | 095 07 54 W |
| Pettis | Populated Place | 375 | Sac | 42 22 07 N | 094 56 09 W |
| Pettis Post Office (historical) | Post Office | 372 | Sac | 42 22 07 N | 094 57 16 W |
| Pettit Building | Building | 261 | Polk | 41 37 19 N | 093 36 23 W |
| Pettit Hill Cemetery | Cemetery | 237 | Benton | 42 11 30 N | 091 59 51 W |
| Pettitts Branch | Stream | | Cass | 41 17 38 N | 094 52 19 W |
| Pewter Cemetery | Cemetery | 248 | Davis | 40 48 30 N | 092 19 31 W |
| Pfeifer Residence | Building | 271 | Linn | 41 55 27 N | 091 25 32 W |
| Pfeiffer Dining Hall | Building | 294 | Warren | 41 21 58 N | 093 33 49 W |
| Pfeiffer Park | Park | 269 | Black Hawk | 42 31 29 N | 092 26 04 W |
| Pharis School | School | 250 | Monroe | 41 00 58 N | 092 51 11 W |
| Pharmacy Building | Building | 216 | Johnson | 41 39 35 N | 091 32 46 W |
| Pheasant Hill Park | Park | 236 | Johnson | 41 39 43 N | 091 29 44 W |
| Pheasant Ridge Golf Course | Locale | 299 | Black Hawk | 42 31 60 N | 092 29 39 W |
| Phelps Cemetery | Cemetery | 317 | Winneshiek | 43 17 30 N | 091 47 05 W |
| Phelps Creek | Stream | | Grundy | 42 35 21 N | 092 45 41 W |
| Phelps Park | Park | 287 | Winneshiek | 43 17 52 N | 091 48 11 W |
| Phenix Elementary School | School | 248 | Polk | 41 34 29 N | 093 42 41 W |
| Philadelphia Cemetery | Cemetery | 306 | Appanoose | 40 46 07 N | 092 59 60 W |
| Philadelphia Seventh Day Adventist Church | Church | 259 | Polk | 41 36 08 N | 093 35 48 W |
| Philby | Populated Place | 430 | O'Brien | 43 04 11 N | 095 48 06 W |
| Philby Post Office (historical) | Post Office | 430 | O'Brien | 43 04 11 N | 095 48 06 W |
| Philips Cemetery | Cemetery | 233 | Washington | 41 20 00 N | 091 44 51 W |
| Phillips | Populated Place | 247 | Wapello | 41 03 14 N | 092 25 37 W |
| Phillips Cemetery | Cemetery | 387 | Howard | 43 26 04 N | 092 10 48 W |
| Phillips Cemetery | Cemetery | 220 | Van Buren | 40 38 50 N | 091 59 33 W |
| Phillips Creek | Stream | | Henry | 41 08 37 N | 091 27 10 W |
| Phillips Hall | Building | 211 | Johnson | 41 39 42 N | 091 32 03 W |
| Phillips School | School | 250 | Polk | 41 36 30 N | 093 34 18 W |
| Phillipston Post Office (historical) | Post Office | 321 | Bremer | 42 50 30 N | 092 19 31 W |
| Philo Post Office (historical) | Post Office | 409 | Sac | 42 19 40 N | 095 08 41 W |
| Philo Post Office (historical) | Post Office | 397 | Union | 41 01 14 N | 094 16 21 W |
| Phinny Park | Park | 331 | Webster | 42 30 17 N | 094 12 14 W |
| Pho Mon Buddhist Temple | Church | 368 | Woodbury | 42 30 30 N | 096 24 39 W |
| Physical Education and Health Center | Building | 437 | Sioux | 42 59 45 N | 096 03 34 W |
| Physical Education Center | Building | 284 | Bremer | 42 43 43 N | 092 29 01 W |
| Physical Education Center | Building | 213 | Scott | 41 32 29 N | 090 34 48 W |
| Physical Education Complex | Building | 311 | Poweshiek | 41 45 04 N | 092 43 10 W |
| Physical Plant | Building | 282 | Black Hawk | 42 25 50 N | 092 19 51 W |
| Physical Plant | Building | 295 | Warren | 41 21 50 N | 093 33 44 W |
| Physical Plant Center | Building | 266 | Marion | 41 24 02 N | 092 55 12 W |
| Physical Plant Maintenance Shop | Building | 433 | Sioux | 43 11 05 N | 095 52 51 W |
| Physical Therapy Building | Building | 284 | Polk | 41 35 00 N | 093 39 41 W |
| Physical Therapy Health Clinic | Hospital | 445 | Sioux | 43 04 48 N | 096 10 34 W |
| Physical Therapy Rost Clinic | Hospital | 370 | Calhoun | 42 23 52 N | 094 37 21 W |
| Physicians Clinic of Iowa | Hospital | 239 | Johnson | 41 44 30 N | 091 37 01 W |
| Physicians Clinic of Iowa | Hospital | 229 | Linn | 41 58 50 N | 091 39 31 W |
| Physics Building | Building | 285 | Black Hawk | 42 30 57 N | 092 27 30 W |
| Physics Hall | Building | 290 | Story | 42 01 45 N | 093 38 51 W |
| Physiology Research Lab | Building | 245 | Johnson | 41 42 22 N | 091 36 21 W |
| Piano | Locale | 305 | Appanoose | 40 44 22 N | 093 00 11 W |
| Picayune Airport | Airport | 246 | Johnson | 41 42 30 N | 091 30 01 W |
| Picayune Chute | Stream | | Clayton | 42 41 10 N | 090 57 19 W |
| Picayune Creek | Stream | | Harrison | 41 44 38 N | 095 41 31 W |
| Picayune Creek | Stream | | Johnson | 41 33 26 N | 091 34 44 W |
| Pickard Cemetery | Cemetery | 196 | Henry | 40 53 30 N | 091 33 31 W |
| Pickard Recreation Area | Park | 270 | Warren | 41 21 11 N | 093 31 23 W |
| Pickaway Post Office (historical) | Post Office | 270 | Benton | 41 57 48 N | 092 09 11 W |
| Picken Residence Hall | Building | 293 | Warren | 41 21 50 N | 093 33 51 W |
| Pickerel Lake | Lake | 411 | Buena Vista | 42 54 24 N | 094 55 18 W |
| Pickerel Lake State Wildlife Management Area | Park | 411 | Clay | 42 54 29 N | 094 55 21 W |
| Pickerel Run | Stream | | Clay | 43 07 42 N | 095 00 36 W |
| Pickering | Locale | 304 | Marshall | 41 56 27 N | 092 49 00 W |
| Pickering | Populated Place | 304 | Marshall | 41 56 27 N | 092 49 00 W |
| Pickering Post Office (historical) | Post Office | 304 | Marshall | 41 56 27 N | 092 49 00 W |
| Pickle Cemetery | Cemetery | 215 | Henry | 40 49 22 N | 091 27 17 W |
| Pickle Church | Church | 217 | Henry | 40 49 21 N | 091 27 17 W |
| Pickway Post Office (historical) | Post Office | 219 | Marion | 41 26 50 N | 093 12 21 W |
| Pickwick | Populated Place | 196 | Wapello | 41 00 30 N | 092 25 07 W |
| Pickwick Church of Christ | Church | 206 | Wapello | 40 59 53 N | 092 26 15 W |
| Pickwick Elementary School | School | 208 | Wapello | 40 59 51 N | 092 26 24 W |
| Pickwick Park | Park | 200 | Wapello | 40 59 49 N | 092 25 43 W |
| Pictured Rocks County Park | Park | 269 | Jones | 42 13 10 N | 091 06 21 W |
| Pierce Cemetery | Cemetery | 236 | Davis | 40 52 15 N | 092 17 39 W |
| Pierce Creek Recreation Area | Park | 318 | Page | 40 50 30 N | 095 21 26 W |
| Pierce Family Cemetery | Cemetery | 321 | Taylor | 40 52 40 N | 094 54 01 W |
| Pierce Hall | Building | 431 | Buena Vista | 42 38 25 N | 095 12 33 W |
| Pierce Park | Park | 260 | Linn | 42 01 24 N | 091 40 43 W |
| Pierce Point (historical) | Locale | 275 | Dallas | 41 42 21 N | 094 02 45 W |
| Pierce Pool | Lake | 345 | Kossuth | 43 18 43 N | 094 07 15 W |
| Pierce Post Office (historical) | Post Office | 279 | Jones | 42 04 25 N | 090 56 41 W |
| Pierce School | School | 253 | Linn | 42 01 24 N | 091 40 35 W |
| Pierceville | Populated Place | 223 | Van Buren | 40 47 04 N | 091 50 01 W |
| Pierceville Post Office (historical) | Post Office | 226 | Van Buren | 40 47 02 N | 091 49 60 W |
| Piero | Locale | 355 | Woodbury | 42 20 22 N | 096 01 10 W |
| Piero Post Office (historical) | Post Office | 347 | Woodbury | 42 19 30 N | 095 58 56 W |
| Pierre (historical) | Locale | 256 | Jackson | 42 03 38 N | 090 56 17 W |
| Piersol Cemetery | Cemetery | 238 | Iowa | 41 32 26 N | 091 57 44 W |
| Pierson | Populated Place | 390 | Woodbury | 42 32 39 N | 095 52 03 W |
| Pierson (historical) | Locale | 385 | Woodbury | 42 32 31 N | 095 52 01 W |
| Pierson City Hall | Building | 390 | Woodbury | 42 32 38 N | 095 52 01 W |
| Pierson Creek | Stream | | Woodbury | 42 28 58 N | 095 47 34 W |
| Pierson Field | Airport | 255 | Mahaska | 41 19 30 N | 092 43 02 W |
| Pierson Library | Building | 391 | Woodbury | 42 32 44 N | 095 52 10 W |
| Pierson Middle School | School | 402 | Woodbury | 42 32 52 N | 095 52 09 W |
| Pierson Post Office | Post Office | 389 | Woodbury | 42 32 39 N | 095 52 06 W |
| Pierson United Methodist Church | Church | 404 | Woodbury | 42 32 48 N | 095 52 02 W |
| Pietenpol Hall | Building | 267 | Marion | 41 24 08 N | 092 55 13 W |
| Pietenpol House | Building | 266 | Marion | 41 24 03 N | 092 55 04 W |
| Pig Creek | Stream | | Iowa | 41 37 39 N | 092 10 13 W |
| Pigeon | Populated Place | 341 | Pottawattamie | 41 27 32 N | 095 47 03 W |
| Pigeon Creek | Stream | | Appanoose | 40 37 36 N | 092 44 55 W |
| Pigeon Creek | Stream | | Pottawattamie | 41 19 11 N | 095 53 14 W |
| Pigeon Creek | Stream | | Scott | 41 32 49 N | 090 26 35 W |
| Pigeon Creek Park | Park | 173 | Scott | 41 33 24 N | 090 25 50 W |
| Pigeon Post Office (historical) | Post Office | 341 | Pottawattamie | 41 27 32 N | 095 47 03 W |
| Pigpen Slough | Stream | | Allamakee | 43 29 35 N | 091 14 55 W |
| Pike Creek | Stream | | Muscatine | 41 21 11 N | 091 19 58 W |