Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Olsens Spring | Spring | 1580 | Box Elder | 41 30 52 N | 111 56 30 W |
| Olympia Bar | Bar | 1129 | San Juan | 37 35 42 N | 110 36 03 W |
| Olympus Heights (subdivision) | Populated Place | 1402 | Salt Lake | 40 40 50 N | 111 49 17 W |
| Olympus Heights (subdivision) | Populated Place | 1440 | Weber | 41 13 50 N | 111 55 54 W |
| Olympus High School | School | 1398 | Salt Lake | 40 41 01 N | 111 49 25 W |
| Olympus Hills Shopping Center | Locale | 1528 | Salt Lake | 40 41 08 N | 111 47 39 W |
| Olympus Junior High School | School | 1355 | Salt Lake | 40 40 06 N | 111 49 41 W |
| Olympus Shadows Estates | Populated Place | 1473 | Salt Lake | 40 38 58 N | 111 48 23 W |
| Olympus View | Populated Place | 1338 | Salt Lake | 40 38 36 N | 111 51 07 W |
| Olympus View Heights (subdivision) | Populated Place | 1437 | Salt Lake | 40 40 49 N | 111 48 43 W |
| Olympus View Hospital | Hospital | 1351 | Salt Lake | 40 41 46 N | 111 50 60 W |
| Oman Ranch Airport | Airport | 1266 | Emery | 38 46 60 N | 110 20 03 W |
| Omans Ranch | Locale | 2177 | Carbon | 39 38 01 N | 111 03 40 W |
| Ombey | Locale | 1442 | Box Elder | 41 38 07 N | 113 13 16 W |
| Onaqui Mountains | Range | 2457 | Tooele | 40 12 36 N | 112 33 38 W |
| One Eye Canyon | Valley | | Grand | 39 19 25 N | 109 37 52 W |
| One Horse Canyon | Valley | | Weber | 41 17 30 N | 111 56 23 W |
| One O'Clock | Summit | 1751 | Tooele | 40 30 39 N | 112 18 22 W |
| Onemile Creek | Stream | | Box Elder | 42 04 10 N | 113 26 44 W |
| Onemile Guard Station | Locale | 2082 | Box Elder | 41 56 56 N | 113 27 39 W |
| Onequa School | School | 1287 | Salt Lake | 40 46 51 N | 111 55 23 W |
| Onion Creek | Stream | | Grand | 38 44 11 N | 109 21 43 W |
| Onion Creek Rapids | Rapids | 1236 | Grand | 38 44 08 N | 109 21 48 W |
| Onion Flats Seep | Spring | 1996 | Garfield | 37 56 05 N | 111 06 38 W |
| Ontario (subdivision) | Populated Place | 1290 | Salt Lake | 40 44 50 N | 111 54 05 W |
| Ontario Canyon | Valley | | Summit | 40 38 45 N | 111 29 48 W |
| Ontario Drain Tunnel | Tunnel | 2218 | Wasatch | 40 37 46 N | 111 27 41 W |
| Ontario Number 1 Shaft | Mine | 2400 | Summit | 40 37 26 N | 111 29 53 W |
| Ontario Ridge | Ridge | 2272 | Summit | 40 37 58 N | 111 29 46 W |
| Ontario Shaft Number 2 | Mine | 2422 | Summit | 40 37 21 N | 111 29 39 W |
| Oowah Campground | Locale | 2684 | Grand | 38 30 10 N | 109 16 20 W |
| Open A | Flat | 2447 | Tooele | 39 59 05 N | 113 53 60 W |
| Open A Canyon | Valley | | Tooele | 40 00 31 N | 113 57 23 W |
| Open Door Baptist Church | Church | 1300 | Salt Lake | 40 42 41 N | 112 05 53 W |
| Open Ridge Draw | Valley | | Iron | 37 37 48 N | 113 58 27 W |
| Open Spring | Spring | 2383 | Rich | 41 25 16 N | 111 27 22 W |
| Opex | Mine | 2157 | Juab | 39 56 10 N | 112 07 14 W |
| Ophir | Populated Place | 1961 | Tooele | 40 22 10 N | 112 15 31 W |
| Ophir Canyon | Valley | | Tooele | 40 20 58 N | 112 18 18 W |
| Ophir Creek | Stream | | Tooele | 40 19 01 N | 112 19 56 W |
| Oquirlane | Populated Place | 1337 | Salt Lake | 40 41 54 N | 112 05 19 W |
| Oquirrh | Populated Place | 1498 | Salt Lake | 40 37 50 N | 112 02 02 W |
| Oquirrh Estates (subdivision) | Populated Place | 1378 | Salt Lake | 40 31 12 N | 111 57 37 W |
| Oquirrh Hills Middle School | School | 1374 | Salt Lake | 40 33 15 N | 111 57 23 W |
| Oquirrh Hills Office Building Condo | Populated Place | 1379 | Salt Lake | 40 39 23 N | 111 59 10 W |
| Oquirrh Hills School | School | 1387 | Salt Lake | 40 39 19 N | 111 59 33 W |
| Oquirrh Hills Subdivision | Populated Place | 1305 | Salt Lake | 40 42 32 N | 112 05 43 W |
| Oquirrh Hills Subdivision 2-4 | Populated Place | 1326 | Salt Lake | 40 42 05 N | 112 05 57 W |
| Oquirrh Hills Subdivision 5, 6, 8 and 9 | Populated Place | 1337 | Salt Lake | 40 41 53 N | 112 05 41 W |
| Oquirrh Mountains | Range | 2340 | Salt Lake | 40 34 39 N | 112 10 57 W |
| Oquirrh School | School | 1307 | Salt Lake | 40 45 42 N | 111 52 49 W |
| Oquirrh Shadows | Populated Place | 1434 | Salt Lake | 40 37 57 N | 112 00 53 W |
| Oquirrh View | Populated Place | 1470 | Weber | 41 09 05 N | 111 55 34 W |
| Orange Cliffs | Cliff | 1580 | Wayne | 38 17 24 N | 110 08 13 W |
| Orange Olsen Administrative Site | Locale | 2196 | Emery | 39 18 05 N | 111 17 48 W |
| Orange Ridge | Ridge | 3016 | Iron | 37 39 15 N | 112 50 56 W |
| Orangeville | Populated Place | 1760 | Emery | 39 13 38 N | 111 03 13 W |
| Orangeville Cemetery | Cemetery | 1789 | Emery | 39 13 54 N | 111 04 10 W |
| Orchard Acres (subdivision) | Populated Place | 1334 | Davis | 40 50 58 N | 111 54 14 W |
| Orchard Addition (subdivision) | Populated Place | 1315 | Weber | 41 14 50 N | 111 57 50 W |
| Orchard Corners Condominium | Populated Place | 1358 | Davis | 40 50 46 N | 111 54 03 W |
| Orchard Country Woods Condo | Populated Place | 1363 | Salt Lake | 40 37 09 N | 111 51 38 W |
| Orchard Gardens (subdivision) | Populated Place | 1386 | Salt Lake | 40 40 45 N | 111 49 36 W |
| Orchard Grove Addition (subdivision) | Populated Place | 1306 | Weber | 41 15 26 N | 111 58 30 W |
| Orchard Grove Annex (subdivision) | Populated Place | 1309 | Weber | 41 15 27 N | 111 58 16 W |
| Orchard Heights (subdivision) | Populated Place | 1422 | Davis | 40 53 13 N | 111 51 43 W |
| Orchard Hills (subdivision) | Populated Place | 1394 | Davis | 40 50 20 N | 111 54 13 W |
| Orchard Hills East (subdivision) | Populated Place | 1521 | Davis | 40 50 10 N | 111 53 40 W |
| Orchard Park | Park | 1330 | Weber | 41 12 16 N | 111 57 51 W |
| Orchard Park (subdivision) | Populated Place | 1389 | Davis | 40 52 20 N | 111 52 28 W |
| Orchard Park Estates Subdivision Number One and Two | Populated Place | 1326 | Weber | 41 14 20 N | 111 56 49 W |
| Orchard Park Subdivision Number 3-7 | Populated Place | 1330 | Weber | 41 14 20 N | 111 56 36 W |
| Orchard Place (subdivision) | Populated Place | 1413 | Davis | 40 51 50 N | 111 52 38 W |
| Orchard School | School | 1476 | Utah | 40 18 60 N | 111 40 33 W |
| Orchard View (subdivision) | Populated Place | 1329 | Davis | 40 55 30 N | 111 52 28 W |
| Orchard View (subdivision) | Populated Place | 1314 | Salt Lake | 40 41 53 N | 112 03 43 W |
| Orchid Draw | Valley | | Uintah | 40 26 15 N | 109 19 11 W |
| Order Canyon | Valley | | Iron | 37 51 33 N | 112 47 00 W |
| Order Canyon | Valley | | Piute | 38 17 17 N | 112 18 03 W |
| Order Canyon | Valley | | Sanpete | 39 05 00 N | 111 40 22 W |
| Order Dugway Canyon | Valley | | Sevier | 38 38 13 N | 112 05 56 W |
| Order Mountain | Summit | 2859 | Sanpete | 39 02 41 N | 111 38 25 W |
| Orderville | Populated Place | 1659 | Kane | 37 16 33 N | 112 38 16 W |
| Orderville Canyon | Valley | | Washington | 37 18 28 N | 112 56 48 W |
| Orderville Cemetery | Cemetery | 1668 | Kane | 37 16 20 N | 112 38 15 W |
| Orderville Gulch | Valley | | Kane | 37 19 21 N | 112 52 33 W |
| Orderville Post Office | Post Office | 1661 | Kane | 37 16 34 N | 112 38 18 W |
| Oregon Springs | Spring | 1371 | Box Elder | 41 59 43 N | 112 11 49 W |
| Orem | Populated Place | 1455 | Utah | 40 17 49 N | 111 41 41 W |
| Orem Bench Wildlife Management Area | Park | 1807 | Utah | 40 20 26 N | 111 38 50 W |
| Orem Cemetery | Cemetery | 1491 | Utah | 40 19 21 N | 111 40 26 W |
| Orem Community Church | Church | 1465 | Utah | 40 17 58 N | 111 41 08 W |
| Orem Community Hospital | Hospital | 1450 | Utah | 40 18 20 N | 111 42 20 W |
| Orem High School | School | 1459 | Utah | 40 17 37 N | 111 41 05 W |
| Orem Junior High School | School | 1446 | Utah | 40 18 38 N | 111 42 40 W |
| Orem Plaza Center Street | Locale | 1455 | Utah | 40 17 50 N | 111 41 44 W |
| Orem Post Office | Post Office | 1456 | Utah | 40 17 52 N | 111 41 40 W |
| Orem School | School | 1447 | Utah | 40 17 22 N | 111 42 23 W |
| Orem Station | Populated Place | 1450 | Utah | 40 18 35 N | 111 42 18 W |
| Organ Grinders Monkey | Pillar | 2338 | Garfield | 37 37 17 N | 112 09 43 W |
| Organ Rock | Pillar | 1524 | San Juan | 37 07 27 N | 110 22 10 W |
| Organization Camp Recreation Site | Park | 2845 | Summit | 40 56 31 N | 110 36 31 W |
| Orient Mine | Mine | 1972 | Juab | 39 50 36 N | 112 24 05 W |
| Original Iron King | Mine | 1974 | Utah | 39 56 27 N | 112 05 11 W |
| Orins Well | Well | 1492 | Kane | 37 27 23 N | 111 14 16 W |
| Ormand Point | Cliff | 2258 | Garfield | 37 56 56 N | 111 26 45 W |
| Orme Spring | Spring | 1607 | Juab | 39 40 11 N | 111 55 26 W |
| Oro del Rey Mine | Mine | 2652 | Tooele | 39 55 24 N | 113 50 14 W |
| Oro Plata Mine | Mine | 1933 | Juab | 39 50 45 N | 112 24 41 W |
| Orr Ranch | Locale | 1432 | Tooele | 40 18 01 N | 112 43 52 W |