Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Ong | Populated Place | 513 | Clay | 40 23 55 N | 097 50 09 W |
| Ong Cemetery | Cemetery | 515 | Clay | 40 24 28 N | 097 50 13 W |
| Ong Fire Department | Building | 513 | Clay | 40 23 55 N | 097 50 09 W |
| Ong Post Office | Post Office | 513 | Clay | 40 23 55 N | 097 50 09 W |
| Onion Crest Airpark | Airport | 666 | Buffalo | 40 46 30 N | 099 09 17 W |
| Onstot Canyon | Valley | | Garden | 41 20 23 N | 102 17 52 W |
| Opal Spring | Spring | 829 | Lincoln | 40 44 23 N | 100 41 38 W |
| Open Bible Church | Church | 798 | Blaine | 41 49 43 N | 100 06 16 W |
| Open Bible Church | Church | 655 | Buffalo | 40 41 32 N | 099 05 01 W |
| Open Bible Church | Church | 367 | Douglas | 41 13 52 N | 096 06 16 W |
| Open Bible Evangelical Free Church | Church | 496 | Butler | 41 16 03 N | 097 07 59 W |
| Open Bible Standard Church | Church | 793 | Custer | 41 37 07 N | 099 51 54 W |
| Open Book Sculpture | Park | 457 | Seward | 40 54 54 N | 097 05 26 W |
| Open Box Arrow Ranch | Locale | 1171 | Garden | 41 50 50 N | 102 07 12 W |
| Open Corral Campground | Locale | 980 | Keith | 41 06 50 N | 101 42 07 W |
| Open Door Church | Church | 1342 | Dawes | 42 38 12 N | 103 03 42 W |
| Open Door Mission | Church | 314 | Douglas | 41 17 10 N | 095 56 39 W |
| Opening the Sandhills Historical Marker | Park | 1094 | Cherry | 42 47 60 N | 102 02 12 W |
| Opportunity | Populated Place | 586 | Holt | 42 35 46 N | 098 30 04 W |
| Opportunity Post Office (historical) | Post Office | 586 | Holt | 42 35 46 N | 098 30 04 W |
| Opportunity Public School | School | 587 | Holt | 42 35 43 N | 098 30 07 W |
| Orabella Park | Park | 855 | Lincoln | 41 07 54 N | 100 46 32 W |
| Orafino | Populated Place | 768 | Frontier | 40 29 50 N | 100 13 44 W |
| Orafino Election Precinct | Civil | 756 | Frontier | 40 28 29 N | 100 16 15 W |
| Orafino Post Office (historical) | Post Office | 768 | Frontier | 40 29 50 N | 100 13 44 W |
| Orchard | Locale | 592 | Antelope | 42 20 00 N | 098 14 31 W |
| Orchard | Populated Place | 592 | Antelope | 42 20 08 N | 098 14 34 W |
| Orchard Alfalfa Canal | Canal | 764 | Dawson | 40 47 40 N | 100 00 29 W |
| Orchard Cemetery | Cemetery | 591 | Antelope | 42 20 11 N | 098 13 26 W |
| Orchard Medical Center | Hospital | 592 | Antelope | 42 20 08 N | 098 14 34 W |
| Orchard Medical Clinic | Hospital | 592 | Antelope | 42 20 08 N | 098 14 34 W |
| Orchard Park | Hospital | 383 | Lancaster | 40 46 54 N | 096 39 12 W |
| Orchard Park | Park | 343 | Douglas | 41 18 40 N | 096 00 46 W |
| Orchard Post Office | Post Office | 592 | Antelope | 42 20 08 N | 098 14 34 W |
| Orchard Public Library | Building | 592 | Antelope | 42 20 08 N | 098 14 34 W |
| Orchard Public Schools | School | 598 | Antelope | 42 20 16 N | 098 14 15 W |
| Ord | Locale | 624 | Valley | 41 36 20 N | 098 55 41 W |
| Ord | Populated Place | 625 | Valley | 41 36 12 N | 098 55 34 W |
| Ord Cemetery | Cemetery | 625 | Valley | 41 36 51 N | 098 56 26 W |
| Ord Christian Church | Church | 625 | Valley | 41 36 12 N | 098 55 34 W |
| Ord Creek | Stream | | Nemaha | 40 25 19 N | 095 50 51 W |
| Ord Elementary School | School | 636 | Valley | 41 35 45 N | 098 55 46 W |
| Ord Family Health Center | Hospital | 644 | Valley | 41 36 05 N | 098 56 26 W |
| Ord Fire Department | Building | 628 | Valley | 41 36 05 N | 098 55 44 W |
| Ord Golf Club | Locale | 624 | Valley | 41 36 35 N | 098 56 29 W |
| Ord Junior-Senior High School | School | 627 | Valley | 41 36 16 N | 098 55 56 W |
| Ord Police Department | Building | 628 | Valley | 41 36 05 N | 098 55 44 W |
| Ord Post Office | Post Office | 627 | Valley | 41 36 12 N | 098 55 49 W |
| Ord Township Library | Building | 628 | Valley | 41 36 08 N | 098 55 51 W |
| Ord-North Loup Canal | Canal | 607 | Valley | 41 32 07 N | 098 47 06 W |
| Oreapolis | Locale | 294 | Cass | 41 02 51 N | 095 55 06 W |
| Oreapolis | Populated Place | 294 | Cass | 41 02 51 N | 095 55 06 W |
| Oreapolis Post Office (historical) | Post Office | 294 | Cass | 41 02 51 N | 095 55 06 W |
| Oregon Trail | Trail | 1122 | Keith | 41 11 14 N | 102 04 27 W |
| Oregon Trail Church of the Nazarene | Church | 1190 | Scotts Bluff | 41 49 25 N | 103 39 26 W |
| Oregon Trail Golf Course | Locale | 936 | Lincoln | 41 07 28 N | 101 07 27 W |
| Oregon Trail Historical Marker | Park | 611 | Adams | 40 34 02 N | 098 33 31 W |
| Oregon Trail Memorial Cemetery | Cemetery | 1125 | Morrill | 41 40 12 N | 103 08 44 W |
| Oregon Trail Park | Locale | 1196 | Scotts Bluff | 41 48 55 N | 103 39 47 W |
| Oregon Trail Park | Park | 484 | Nuckolls | 40 14 13 N | 097 54 12 W |
| Oregon Trail Park | Park | 1195 | Scotts Bluff | 41 49 02 N | 103 39 50 W |
| Oregon Trail Park Campground | Locale | 902 | Lincoln | 41 09 25 N | 101 07 35 W |
| Oregon Trail Wagon Train Campground | Locale | 1148 | Morrill | 41 43 45 N | 103 22 07 W |
| Orella | Populated Place | 1136 | Sioux | 42 53 36 N | 103 30 02 W |
| Orella Post Office (historical) | Post Office | 1136 | Sioux | 42 53 36 N | 103 30 02 W |
| Original Townsite of Wood River Historical Marker | Park | 605 | Hall | 40 48 17 N | 098 39 16 W |
| Orleans | Locale | 608 | Harlan | 40 07 50 N | 099 27 51 W |
| Orleans | Populated Place | 614 | Harlan | 40 07 45 N | 099 27 19 W |
| Orleans Elevator | Locale | 614 | Harlan | 40 07 45 N | 099 27 19 W |
| Orleans Post Office | Post Office | 614 | Harlan | 40 07 45 N | 099 27 19 W |
| Orleans Presbyterian Church | Church | 614 | Harlan | 40 07 45 N | 099 27 19 W |
| Orleans RV Park | Locale | 614 | Harlan | 40 07 45 N | 099 27 19 W |
| Ormesher Dam | Dam | 982 | Dawes | 42 59 36 N | 102 57 20 W |
| Ormesher Ranch | Locale | 814 | Cherry | 42 48 20 N | 100 29 21 W |
| Ormesher Reservoir | Reservoir | 982 | Dawes | 42 59 36 N | 102 57 20 W |
| Orr Airport | Airport | 1169 | Sheridan | 42 23 01 N | 102 26 21 W |
| Orr Ranch | Locale | 1121 | Garden | 41 28 26 N | 101 59 55 W |
| Orr Ranch | Locale | 1214 | Sheridan | 42 21 48 N | 102 18 22 W |
| Orr Ranch | Locale | 1165 | Sheridan | 42 22 60 N | 102 26 37 W |
| Orr Ranch | Locale | 1393 | Sioux | 42 03 60 N | 103 28 48 W |
| Orr Ranch Airport | Airport | 1187 | Sheridan | 42 23 09 N | 102 34 33 W |
| Ortello Cemetery | Cemetery | 833 | Custer | 41 30 41 N | 099 54 10 W |
| Ortello Chapel | Church | 821 | Custer | 41 31 29 N | 099 54 10 W |
| Ortello Post Office (historical) | Post Office | 822 | Custer | 41 31 30 N | 099 54 10 W |
| Ortello School (historical) | School | 820 | Custer | 41 31 55 N | 099 54 46 W |
| Ortello Valley | Basin | 819 | Custer | 41 31 07 N | 099 52 42 W |
| Orthopaedic Specialists of Nebraska | Hospital | 570 | Hall | 40 55 34 N | 098 22 00 W |
| Orum | Populated Place | 403 | Washington | 41 32 45 N | 096 16 14 W |
| Orum Aerodrome | Airport | 404 | Washington | 41 32 29 N | 096 16 27 W |
| Orum Post Office (historical) | Post Office | 403 | Washington | 41 32 45 N | 096 16 14 W |
| Orval Smith Park | Park | 327 | Douglas | 41 11 60 N | 096 02 21 W |
| Osage State Wildlife Management Area | Park | 379 | Johnson | 40 24 40 N | 096 13 41 W |
| Osborn Cemetery | Cemetery | 525 | Madison | 41 52 51 N | 097 39 11 W |
| Osborn Election Precinct | Civil | 841 | Frontier | 40 24 23 N | 100 43 15 W |
| Osborne Lake | Lake | 1168 | Sheridan | 42 23 55 N | 102 05 33 W |
| Osburn Overlook | Locale | 740 | Cherry | 42 52 48 N | 100 15 36 W |
| Osceola | Locale | 497 | Polk | 41 10 42 N | 097 33 09 W |
| Osceola | Populated Place | 508 | Polk | 41 10 47 N | 097 32 51 W |
| Osceola and the Early Pioneer: 1867-1967 Historical Marker | Park | 497 | Polk | 41 11 01 N | 097 32 36 W |
| Osceola Drive Inn | Locale | 508 | Polk | 41 10 47 N | 097 32 51 W |
| Osceola Elementary School | School | 504 | Polk | 41 10 30 N | 097 32 41 W |
| Osceola Good Samaritan Center | Hospital | 508 | Polk | 41 10 47 N | 097 32 51 W |
| Osceola High School | School | 508 | Polk | 41 10 20 N | 097 32 41 W |
| Osceola Lutheran Church | Church | 506 | Polk | 41 10 21 N | 097 32 55 W |
| Osceola Post Office | Post Office | 504 | Polk | 41 10 45 N | 097 32 46 W |
| Osceola Public Library | Building | 506 | Polk | 41 10 42 N | 097 32 49 W |
| Osco Cemetery | Cemetery | 643 | Kearney | 40 22 21 N | 098 48 44 W |
| Osco Church | Church | 646 | Kearney | 40 22 46 N | 098 50 17 W |
| Osco Post Office (historical) | Post Office | 645 | Kearney | 40 22 32 N | 098 50 01 W |
| Osgood Election Precinct | Civil | 873 | Lincoln | 41 04 54 N | 100 44 51 W |