| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| O'Neill | city | Utah | United States | 41.21 | -111.94 | 5052 | |
| Oak City | city | Utah | United States | 39.37 | -112.34 | 5173 | |
| Oak Creek | city | Utah | United States | 39.67 | -111.43 | 6220 | |
| Oak Creek Estates | city | Utah | United States | 41.17 | -111.95 | 5029 | |
| Oak Creek Hills | city | Utah | United States | 40.61 | -111.80 | 5042 | |
| Oak Creek Residential Area | city | Utah | United States | 37.21 | -112.99 | 4189 | |
| Oak Crest Park Addition | city | Utah | United States | 41.21 | -111.94 | 5029 | |
| Oak Forest One | city | Utah | United States | 41.09 | -111.93 | 5029 | |
| Oak Forest Two | city | Utah | United States | 41.10 | -111.91 | 5029 | |
| Oak Hill | city | Utah | United States | 41.08 | -111.92 | 5029 | |
| Oak Hills | city | Utah | United States | 40.86 | -111.87 | 5029 | |
| Oak Hills | city | Utah | United States | 41.22 | -111.93 | 5029 | |
| Oak Hollow | city | Utah | United States | 41.09 | -111.91 | 5029 | |
| Oak Lane | city | Utah | United States | 40.97 | -111.88 | 4406 | |
| Oak Lane Heights | city | Utah | United States | 41.04 | -111.93 | 4514 | |
| Oak Ridge Acres | city | Utah | United States | 41.19 | -111.89 | 8431 | |
| Oak View Estates | city | Utah | United States | 41.19 | -111.94 | 5193 | |
| Oak Way | city | Utah | United States | 40.87 | -111.87 | 4603 | |
| Oak Wood Heights | city | Utah | United States | 41.21 | -111.95 | 4570 | |
| Oak at Wasatch Place | city | Utah | United States | 40.60 | -111.79 | 5396 | |
| Oakcliff Park | city | Utah | United States | 40.67 | -111.80 | 5075 | |
| Oakcliff Park Two | city | Utah | United States | 40.67 | -111.80 | 5396 | |
| Oakcreek Estates | city | Utah | United States | 40.60 | -111.82 | 5029 | |
| Oakcrest | city | Utah | United States | 40.85 | -111.87 | 5173 | |
| Oakcrest | city | Utah | United States | 40.64 | -111.82 | 4580 | |
| Oakcrest Estates | city | Utah | United States | 41.12 | -112.06 | 4320 | |
| Oakdale | city | Utah | United States | 40.65 | -111.84 | 4389 | |
| Oakdale | city | Utah | United States | 40.78 | -111.92 | 4281 | |
| Oakeson Villa | city | Utah | United States | 40.66 | -111.97 | 4412 | |
| Oakhaven Park | city | Utah | United States | 40.87 | -111.87 | 5029 | |
| Oakhaven Village | city | Utah | United States | 40.87 | -111.87 | 4603 | |
| Oakland Place | city | Utah | United States | 40.72 | -111.89 | 4271 | |
| Oakleaf | city | Utah | United States | 40.85 | -111.90 | 4527 | |
| Oakley | city | Utah | United States | 40.71 | -111.30 | 6709 | |
| Oakley | city | Utah | United States | 40.79 | -111.93 | 4274 | |
| Oakley Park | city | Utah | United States | 40.79 | -111.93 | 4274 | |
| Oakmont Acres | city | Utah | United States | 41.05 | -111.91 | 5029 | |
| Oakridge Country Club Estates | city | Utah | United States | 41.00 | -111.92 | 4333 | |
| Oakridge Farms | city | Utah | United States | 41.00 | -111.92 | 4288 | |
| Oakridge Heights | city | Utah | United States | 40.58 | -111.82 | 5029 | |
| Oakridge Highlands | city | Utah | United States | 41.01 | -111.93 | 4330 | |
| Oakridge Manor | city | Utah | United States | 40.87 | -111.86 | 5131 | |
| Oakridge Place | city | Utah | United States | 41.00 | -111.91 | 4317 | |
| Oakridge Terrace | city | Utah | United States | 41.04 | -111.93 | 4514 | |
| Oakridge Village | city | Utah | United States | 41.01 | -111.92 | 4356 | |
| Oakridge Village Condominium | city | Utah | United States | 41.00 | -111.92 | 4333 | |
| Oakview Estates Subdivision Number 1 | city | Utah | United States | 40.61 | -111.81 | 5029 | |
| Oakview Estates Subdivision Numbers 2,3 and 4 | city | Utah | United States | 40.61 | -111.80 | 5029 | |
| Oakvista Park | city | Utah | United States | 40.86 | -111.87 | 5160 | |
| Oakwood Acres | city | Utah | United States | 40.65 | -111.84 | 4389 | |
| Oakwood Estates Subdivision | city | Utah | United States | 40.60 | -111.85 | 5029 | |
| Oakwood One and Three | city | Utah | United States | 40.78 | -111.92 | 4291 | |
| Oakwood Park Condo | city | Utah | United States | 40.59 | -111.87 | 4589 | |
| Oakwood Two | city | Utah | United States | 40.78 | -111.92 | 4278 | |
| Oasis | city | Utah | United States | 39.29 | -112.63 | 5029 | |
| Odell Acres | city | Utah | United States | 40.84 | -111.91 | 4481 | |
| Ogden | city | Utah | United States | 41.22 | -111.97 | 4373 | |
| Ogden Canyon Wildwood Estates | city | Utah | United States | 41.25 | -111.87 | 6709 | |
| Ogden Heights | city | Utah | United States | 41.18 | -112.01 | 4448 | |
| Okcidenta Jordan | city | Utah | United States | 40.61 | -111.94 | 4340 | |
| Old Colony | city | Utah | United States | 40.66 | -111.81 | 5029 | |
| Old Farm Estates | city | Utah | United States | 40.90 | -111.90 | 4284 | |
| Old Irontown | city | Utah | United States | 37.60 | -113.45 | 6026 | |
| Old La Sal | city | Utah | United States | 38.33 | -109.15 | 7549 | |
| Old Limber Pine | city | Utah | United States | 41.92 | -111.47 | 8389 | |
| Old Mill Subdivision Phase 1-3 | city | Utah | United States | 41.24 | -111.95 | 4396 | |
| Old Post Estates | city | Utah | United States | 41.17 | -111.94 | 5029 | |
| Olivers | city | Utah | United States | 40.48 | -111.92 | 4465 | |
| Olivewood Park | city | Utah | United States | 41.15 | -112.04 | 4448 | |
| Oljato | city | Utah | United States | 37.04 | -110.32 | 5029 | |
| Olmstead | city | Utah | United States | 40.32 | -111.65 | 5029 | |
| Olsen | city | Utah | United States | 41.19 | -111.99 | 4366 | |
| Olympus Heights | city | Utah | United States | 41.23 | -111.93 | 5029 | |
| Olympus Heights | city | Utah | United States | 40.68 | -111.82 | 4557 | |
| Olympus Shadows Estates | city | Utah | United States | 40.65 | -111.81 | 5029 | |
| Olympus View | city | Utah | United States | 40.64 | -111.85 | 4406 | |
| Olympus View Heights | city | Utah | United States | 40.68 | -111.81 | 5029 | |
| Ontario | city | Utah | United States | 40.75 | -111.90 | 4284 | |
| Ophir | city | Utah | United States | 40.37 | -112.26 | 8389 | |
| Oquirlane | city | Utah | United States | 40.70 | -112.09 | 4363 | |
| Oquirrh | city | Utah | United States | 40.63 | -112.03 | 5029 | |
| Oquirrh Estates | city | Utah | United States | 40.52 | -111.96 | 4543 | |
| Oquirrh Hills Office Building Condo | city | Utah | United States | 40.66 | -111.99 | 4511 | |
| Oquirrh Hills Subdivision | city | Utah | United States | 40.71 | -112.10 | 4304 | |
| Oquirrh Hills Subdivision 2-4 | city | Utah | United States | 40.70 | -112.10 | 4320 | |
| Oquirrh Hills Subdivision 5, 6, 8 and 9 | city | Utah | United States | 40.70 | -112.09 | 4363 | |
| Oquirrh Shadows | city | Utah | United States | 40.63 | -112.01 | 5029 | |
| Oquirrh View | city | Utah | United States | 41.15 | -111.93 | 5029 | |
| Orangeville | city | Utah | United States | 39.23 | -111.05 | 5869 | |
| Orchard Acres | city | Utah | United States | 40.85 | -111.90 | 4527 | |
| Orchard Addition | city | Utah | United States | 41.25 | -111.96 | 4366 | |
| Orchard Corners Condominium | city | Utah | United States | 40.85 | -111.90 | 4527 | |
| Orchard Country Woods Condo | city | Utah | United States | 40.62 | -111.86 | 4557 | |
| Orchard Gardens | city | Utah | United States | 40.68 | -111.83 | 4507 | |
| Orchard Grove Addition | city | Utah | United States | 41.26 | -111.97 | 4343 | |
| Orchard Grove Annex | city | Utah | United States | 41.26 | -111.97 | 4343 | |
| Orchard Heights | city | Utah | United States | 40.89 | -111.86 | 5029 | |
| Orchard Hills | city | Utah | United States | 40.84 | -111.90 | 5029 | |
| Orchard Hills East | city | Utah | United States | 40.84 | -111.89 | 5275 | |
| Orchard Park | city | Utah | United States | 40.87 | -111.87 | 4603 | |
| Orchard Park Estates Subdivision Number One and Two | city | Utah | United States | 41.24 | -111.95 | 4396 | |
| Orchard Park Subdivision Number 3-7 | city | Utah | United States | 41.24 | -111.94 | 4399 | |
| Orchard Place | city | Utah | United States | 40.86 | -111.88 | 5029 | |
| Orchard View | city | Utah | United States | 40.70 | -112.06 | 4265 | |
| Orchard View | city | Utah | United States | 40.92 | -111.87 | 4383 | |
| Orderville | city | Utah | United States | 37.28 | -112.64 | 5449 | |
| Orem | city | Utah | United States | 40.30 | -111.69 | 5029 | |
| Orem Station | city | Utah | United States | 40.31 | -111.70 | 5029 | |
| Oremas | city | Utah | United States | 40.30 | -111.69 | 5029 | |
| Orson Ellis | city | Utah | United States | 40.87 | -111.90 | 4343 | |
| Osiris | city | Utah | United States | 38.02 | -111.96 | 7109 | |
| Otto Berger Addition | city | Utah | United States | 41.27 | -111.97 | 4373 | |
| Ouray | city | Utah | United States | 40.09 | -109.68 | 5029 | |
| Oxford Manor Condominium | city | Utah | United States | 40.77 | -111.88 | 4356 | |
| Oxford Place | city | Utah | United States | 41.18 | -111.99 | 5029 |