Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Octavia Community Church | Church | 430 | Butler | 41 20 50 N | 097 03 30 W |
| Octavia Post Office | Post Office | 430 | Butler | 41 20 53 N | 097 03 32 W |
| Odaniel Dam | Dam | 1220 | Cheyenne | 41 07 60 N | 102 45 08 W |
| Odaniel Reservoir | Reservoir | 1220 | Cheyenne | 41 07 60 N | 102 45 08 W |
| Odell | Locale | 390 | Gage | 40 02 50 N | 096 48 08 W |
| Odell | Populated Place | 397 | Gage | 40 03 00 N | 096 48 12 W |
| Odell Cemetery | Cemetery | 407 | Gage | 40 03 50 N | 096 48 11 W |
| Odell Post Office | Post Office | 398 | Gage | 40 03 00 N | 096 48 12 W |
| Odell Public Schools | School | 397 | Gage | 40 03 00 N | 096 48 12 W |
| Odencranze Table | Summit | 914 | Lincoln | 41 09 21 N | 100 12 34 W |
| Odessa | Locale | 677 | Buffalo | 40 42 08 N | 099 15 26 W |
| Odessa | Populated Place | 677 | Buffalo | 40 42 06 N | 099 15 24 W |
| Odessa Post Office | Post Office | 677 | Buffalo | 40 42 06 N | 099 15 24 W |
| Odessa Public School | School | 677 | Buffalo | 40 42 11 N | 099 15 22 W |
| Officers Row Historical Marker | Park | 1157 | Dawes | 42 39 60 N | 103 27 52 W |
| Officers Row Historical Marker | Park | 1157 | Dawes | 42 39 60 N | 103 27 52 W |
| Offutt Air Force Base | Airport | 299 | Sarpy | 41 07 05 N | 095 54 46 W |
| Offutt Air Force Base Catholic Church | Church | 309 | Sarpy | 41 07 05 N | 095 55 01 W |
| Offutt Air Force Base Post Office (historical) | Post Office | 309 | Sarpy | 41 07 05 N | 095 55 01 W |
| Ogallala | Locale | 980 | Keith | 41 07 24 N | 101 43 12 W |
| Ogallala | Populated Place | 982 | Keith | 41 07 41 N | 101 43 11 W |
| Ogallala Beach Campground | Locale | 1013 | Keith | 41 12 20 N | 101 43 27 W |
| Ogallala Cemetery | Cemetery | 992 | Keith | 41 07 43 N | 101 44 52 W |
| Ogallala Community Hospital | Hospital | 996 | Keith | 41 07 60 N | 101 43 02 W |
| Ogallala Country Club | Locale | 977 | Keith | 41 06 47 N | 101 40 45 W |
| Ogallala Dam East | Dam | 996 | Keith | 41 08 06 N | 101 43 26 W |
| Ogallala Dam West | Dam | 1000 | Keith | 41 08 06 N | 101 43 56 W |
| Ogallala Eastbound Travel Information Center | Locale | 987 | Keith | 41 06 05 N | 101 46 14 W |
| Ogallala Fire Department | Building | 979 | Keith | 41 07 33 N | 101 42 55 W |
| Ogallala Gulch | Valley | | Keith | 41 07 32 N | 101 46 53 W |
| Ogallala High School | School | 984 | Keith | 41 07 50 N | 101 42 40 W |
| Ogallala Historical Marker | Park | 965 | Keith | 41 07 11 N | 101 36 14 W |
| Ogallala Lake | Lake | 952 | Keith | 41 12 53 N | 101 39 07 W |
| Ogallala Medical Group | Hospital | 982 | Keith | 41 07 40 N | 101 43 12 W |
| Ogallala Middle School | School | 985 | Keith | 41 07 48 N | 101 43 05 W |
| Ogallala Police Department | Building | 979 | Keith | 41 07 33 N | 101 42 55 W |
| Ogallala Post Office | Post Office | 980 | Keith | 41 07 37 N | 101 43 09 W |
| Ogallala Rest Area - Eastbound | Locale | 987 | Keith | 41 06 05 N | 101 46 14 W |
| Ogallala Rest Area - Westbound | Locale | 965 | Keith | 41 07 11 N | 101 36 14 W |
| Ogallala Trail | Trail | 984 | Keith | 41 07 32 N | 101 44 02 W |
| Ogallala Westbound Travel Information Center | Locale | 965 | Keith | 41 07 11 N | 101 36 14 W |
| Oglala National Grassland | Forest | 1175 | Sioux | 42 50 01 N | 103 45 03 W |
| Ohio Election Precinct | Civil | 302 | Richardson | 40 07 59 N | 095 36 34 W |
| Ohiowa | Locale | 485 | Fillmore | 40 24 58 N | 097 27 16 W |
| Ohiowa | Populated Place | 484 | Fillmore | 40 24 52 N | 097 27 10 W |
| Ohiowa Cemetery | Cemetery | 488 | Fillmore | 40 25 25 N | 097 26 35 W |
| Ohiowa Post Office | Post Office | 484 | Fillmore | 40 24 52 N | 097 27 10 W |
| Ohiowa Public School | School | 485 | Fillmore | 40 24 38 N | 097 27 13 W |
| Ohme School (historical) | School | 680 | Custer | 41 27 47 N | 099 12 49 W |
| Ohmstede Dam | Dam | 508 | Webster | 40 02 48 N | 098 20 55 W |
| Ohmstede Dam-1 Dam | Dam | 533 | Webster | 40 01 42 N | 098 21 49 W |
| Ohmstede Reservoir | Reservoir | 508 | Webster | 40 02 48 N | 098 20 55 W |
| Ohmstede Reservoir | Reservoir | 533 | Webster | 40 01 42 N | 098 21 49 W |
| Oir Reservoir 4-C | Reservoir | 420 | Gage | 40 25 54 N | 096 38 13 W |
| Okay Church | Church | 540 | Platte | 41 32 29 N | 097 39 05 W |
| Okay School | School | 530 | Platte | 41 33 20 N | 097 38 00 W |
| Old Baldy | Summit | 471 | Boyd | 42 56 13 N | 098 28 40 W |
| Old Baldy | Summit | 1028 | Dundy | 40 20 46 N | 101 44 40 W |
| Old Baldy | Summit | 1177 | Garden | 41 28 14 N | 102 01 14 W |
| Old Cemetery | Cemetery | 389 | Dodge | 41 27 29 N | 096 47 24 W |
| Old Channel Big Nemaha River | Channel | 274 | Richardson | 40 03 58 N | 095 40 60 W |
| Old Channel Big Nemaha River | Stream | 261 | Richardson | 40 00 16 N | 095 25 36 W |
| Old Channel Logan Creek | Channel | 369 | Dodge | 41 38 58 N | 096 32 01 W |
| Old Channel Logan Creek | Channel | 404 | Wayne | 42 09 28 N | 096 44 12 W |
| Old Channel Muddy Creek | Channel | 266 | Richardson | 40 06 02 N | 095 36 13 W |
| Old Channel South Fork Nemaha River | Channel | 285 | Richardson | 40 04 38 N | 095 49 51 W |
| Old Cheney Alliance Church | Church | 375 | Lancaster | 40 45 18 N | 096 38 46 W |
| Old Cheney Road Trail | Trail | 372 | Lancaster | 40 45 20 N | 096 40 31 W |
| Old Fort Kearney Road Historical Marker | Park | 586 | Hall | 40 46 16 N | 098 23 51 W |
| Old Fort Kearny Historical Marker | Park | 291 | Otoe | 40 40 35 N | 095 50 51 W |
| Old Freighters Museum | Building | 305 | Otoe | 40 40 50 N | 095 51 48 W |
| Old Glenrock Cemetery | Cemetery | 315 | Nemaha | 40 27 52 N | 095 52 36 W |
| Old Gymnasium | Building | 330 | Douglas | 41 15 59 N | 095 56 52 W |
| Old Hebron Cemetery | Cemetery | 467 | Thayer | 40 10 33 N | 097 35 08 W |
| Old Immanuel Cemetery | Cemetery | 521 | Boyd | 42 54 02 N | 098 39 11 W |
| Old Lady Beam Hill | Summit | 1197 | Garden | 41 44 54 N | 102 22 49 W |
| Old Ladys Lake | Lake | 1172 | Garden | 41 51 34 N | 102 32 05 W |
| Old Main | Building | 362 | Lancaster | 40 50 20 N | 096 38 59 W |
| Old Market | Locale | 314 | Douglas | 41 15 20 N | 095 55 49 W |
| Old Merrill Lake | Lake | 1183 | Garden | 41 55 22 N | 102 31 60 W |
| Old Mill Park | Park | 822 | Custer | 41 25 12 N | 100 11 46 W |
| Old Mill Race Canal | Canal | 476 | Nuckolls | 40 00 52 N | 098 04 32 W |
| Old Mill School | School | 440 | Knox | 42 43 54 N | 098 16 34 W |
| Old Palisade Cemetery | Cemetery | 876 | Hitchcock | 40 20 12 N | 101 05 52 W |
| Old Pleasant Hill Cemetery | Cemetery | 368 | Saunders | 41 04 27 N | 096 35 31 W |
| Old Plymouth Cemetery | Cemetery | 415 | Jefferson | 40 15 44 N | 097 01 26 W |
| Old Power Plant | Building | 459 | Wayne | 42 14 31 N | 097 00 57 W |
| Old Rock School (historical) | School | 485 | Thayer | 40 10 36 N | 097 44 16 W |
| Old Rogers School (historical) | School | 433 | Thayer | 40 04 30 N | 097 22 11 W |
| Old Salem Cemetery | Cemetery | 466 | Seward | 40 49 47 N | 097 08 57 W |
| Old Scholtes Ranch | Locale | 934 | Cherry | 42 51 15 N | 101 07 45 W |
| Old Settlers Cemetery | Cemetery | 578 | Boyd | 42 58 23 N | 098 48 03 W |
| Old White School | School | 1070 | Dawes | 42 45 22 N | 103 20 50 W |
| Old Willow Creek Bridge Historical Marker | Park | 479 | Pierce | 42 12 03 N | 097 31 18 W |
| Old Wyoming Post Office (historical) | Post Office | 336 | Otoe | 40 44 08 N | 095 55 10 W |
| Old Yale School | School | 689 | Valley | 41 28 51 N | 099 05 14 W |
| Old Zion Cemetery | Cemetery | 468 | Saline | 40 22 43 N | 097 19 25 W |
| Olde Towne Park | Park | 378 | Lancaster | 40 37 17 N | 096 38 01 W |
| Olde-Fashioned Weeping Water Main Street and Museum Complex | Building | 335 | Cass | 40 52 12 N | 096 08 26 W |
| Oldfather Dam | Dam | 647 | Valley | 41 38 54 N | 098 59 43 W |
| Oldfather Hall | Building | 358 | Lancaster | 40 49 11 N | 096 42 12 W |
| Oldfather Reservoir | Reservoir | 647 | Valley | 41 38 54 N | 098 59 43 W |
| Olds Path Baptist Tabernacle Church | Church | 331 | Washington | 41 32 42 N | 096 08 43 W |
| Olean | Populated Place | 466 | Colfax | 41 44 10 N | 096 56 43 W |
| Olean | Populated Place | 610 | Valley | 41 33 39 N | 098 48 27 W |
| Olean Post Office (historical) | Post Office | 466 | Colfax | 41 44 10 N | 096 56 43 W |
| Olean School | School | 609 | Valley | 41 34 05 N | 098 48 29 W |
| Oles Lodge RV Park | Locale | 932 | Keith | 41 06 50 N | 101 21 20 W |
| Olin Hall of Science | Building | 362 | Lancaster | 40 50 23 N | 096 39 01 W |
| Olin Lecture Halls and Planetarium | Building | 363 | Lancaster | 40 50 23 N | 096 39 00 W |