| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Opa-locka | city | Florida | United States | 25.90194 | -80.25056 | 6 | 325784 |
| Opah | city | Oklahoma | United States | 36.75111 | -96.29306 | 898 | 680 |
| Opal | city | Wyoming | United States | 41.76917 | -110.32528 | 6666 | 33 |
| Opal | city | South Dakota | United States | 44.89167 | -102.45 | 2614 | 33 |
| Opal | city | Arkansas | United States | 34.53944 | -93.98944 | 898 | 644 |
| Opal | city | Missouri | United States | 37.02111 | -93.77 | 1309 | 3954 |
| Opal | city | Arkansas | United States | 35.09722 | -92.00278 | 259 | 2162 |
| Opal | city | West Virginia | United States | 38.38667 | -80.76639 | 2089 | 978 |
| Opal | city | Virginia | United States | 38.62083 | -77.80028 | 403 | 2886 |
| Opal City | city | Oregon | United States | 44.44472 | -121.2125 | 2811 | 673 |
| Opal Cliff Park Mobile Home Park subdivision | city | California | United States | 36.965 | -121.96528 | 29 | 89094 |
| Opal Cliffs | city | California | United States | 36.96083 | -121.96306 | 0 | 89094 |
| Opdyke | city | Texas | United States | 33.59306 | -102.275 | 3418 | 1434 |
| Opdyke | city | Illinois | United States | 38.25972 | -88.79056 | 498 | 1656 |
| Opdyke West | city | Texas | United States | 33.59222 | -102.30194 | 3444 | 6367 |
| Opegoi historical | city | California | United States | 41.25972 | -123.605 | 1013 | 238 |
| Opekiska | city | West Virginia | United States | 39.55722 | -80.05583 | 1069 | 5116 |
| Opeleika historical | city | Georgia | United States | 34.97556 | -85.14167 | 695 | 31618 |
| Opelika | city | Texas | United States | 32.29694 | -95.67417 | 396 | 1987 |
| Opelika | city | Alabama | United States | 32.64528 | -85.37833 | 751 | 23735 |
| Opelousas | city | Louisiana | United States | 30.53333 | -92.08139 | 59 | 24136 |
| Open Acres Manor | city | Maryland | United States | 39.49056 | -76.37222 | 298 | 52484 |
| Open Acres subdivision | city | Alabama | United States | 32.43694 | -86.27917 | 203 | 38239 |
| Open Fork | city | Virginia | United States | 37.04389 | -82.35417 | 1692 | 1505 |
| Open Gates | city | Kentucky | United States | 38.005 | -84.53806 | 1000 | 145589 |
| Open Sands | city | Florida | United States | 30.205 | -85.85778 | 0 | 3692 |
| Openwood Plantation subdivision | city | Mississippi | United States | 32.39583 | -90.79583 | 255 | 8185 |
| Opequon | city | Virginia | United States | 39.15722 | -78.24694 | 898 | 9191 |
| Opequon Farms | city | Maryland | United States | 39.54806 | -77.83972 | 449 | 10108 |
| Opera Plaza subdivision | city | California | United States | 37.78139 | -122.41972 | 160 | 616872 |
| Opera historical | city | Ohio | United States | 39.90944 | -82.16278 | 997 | 3140 |
| Opheim | city | Montana | United States | 48.85667 | -106.40667 | 3198 | 28 |
| Ophelia | city | Virginia | United States | 37.91 | -76.28389 | 3 | 1431 |
| Ophelia historical | city | Mississippi | United States | 32.55889 | -89.81667 | 308 | 1892 |
| Ophelia historical | city | West Virginia | United States | 38.20917 | -80.72 | 2700 | 2344 |
| Ophiem | city | Illinois | United States | 41.2525 | -90.3875 | 698 | 1931 |
| Ophir | city | Alaska | United States | 63.14472 | -156.51944 | 669 | 0 |
| Ophir | city | Oregon | United States | 42.56333 | -124.38167 | 196 | 706 |
| Ophir | city | California | United States | 38.89111 | -121.1225 | 790 | 26698 |
| Ophir | city | Washington | United States | 48.20917 | -119.71667 | 820 | 998 |
| Ophir | city | Utah | United States | 40.36944 | -112.25778 | 8028 | 182 |
| Ophir | city | Colorado | United States | 37.85694 | -107.83194 | 9790 | 327 |
| Ophir | city | Arkansas | United States | 34.44028 | -93.61111 | 698 | 452 |
| Ophir | city | Alabama | United States | 34.36 | -85.94556 | 1138 | 2969 |
| Ophir | city | Georgia | United States | 34.32944 | -84.265 | 1197 | 6256 |
| Ophir | city | Kentucky | United States | 37.90722 | -83.01444 | 1036 | 1755 |
| Ophir | city | North Carolina | United States | 35.47778 | -79.97917 | 498 | 1039 |
| Ophir City historical | city | Nevada | United States | 39.29278 | -119.82528 | 5085 | 3294 |
| Ophir Hill Acres | city | California | United States | 39.19306 | -121.03944 | 2998 | 17694 |
| Ophir Loop | city | Colorado | United States | 37.85972 | -107.86778 | 10098 | 398 |
| Ophir historical | city | Nevada | United States | 38.94722 | -117.27306 | 7811 | 19 |
| Ophir historical | city | Montana | United States | 47.93194 | -110.47222 | 2598 | 52 |
| Opie | city | Virginia | United States | 36.76861 | -78.18306 | 400 | 3726 |
| Opihikao | city | Hawaii | United States | 19.42972 | -154.88333 | 3 | 1008 |
| Opine | city | Alabama | United States | 31.90472 | -87.93389 | 173 | 1097 |
| Opine | city | Alabama | United States | 31.3275 | -86.28722 | 331 | 6068 |
| Opitz historical | city | Arkansas | United States | 34.4875 | -92.64028 | 249 | 4480 |
| Oplin | city | Texas | United States | 32.13861 | -99.55833 | 1994 | 1181 |
| Opole | city | Minnesota | United States | 45.74667 | -94.36861 | 1135 | 2101 |
| Opolis | city | Kansas | United States | 37.34444 | -94.62083 | 918 | 3594 |
| Oponys Town historical | city | Florida | United States | 27.78333 | -81.8 | 111 | 2458 |
| Opossum | city | Tennessee | United States | 35.70972 | -89.56444 | 396 | 5988 |
| Opossum Creek Pines | city | Tennessee | United States | 35.30583 | -85.09806 | 692 | 6248 |
| Opossum Point Landing | city | South Carolina | United States | 32.17694 | -80.77306 | 3 | 17554 |
| Opossum historical | city | Tennessee | United States | 36.575 | -82.78333 | 1614 | 7096 |
| Opp | city | Alabama | United States | 31.2825 | -86.25556 | 334 | 6575 |
| Oppelo | city | Arkansas | United States | 35.10111 | -92.7675 | 298 | 2455 |
| Oppenheim | city | New York | United States | 43.07222 | -74.69306 | 1036 | 2018 |
| Oppenheimer | city | Pennsylvania | United States | 40.12361 | -78.47139 | 1364 | 3154 |
| Opperman | city | Ohio | United States | 39.89056 | -81.60083 | 997 | 3388 |
| Oppermans Corner | city | Pennsylvania | United States | 40.07833 | -75.63444 | 423 | 32823 |
| Opportunity | city | Washington | United States | 47.6575 | -117.23889 | 2076 | 57836 |
| Opportunity | city | Montana | United States | 46.10722 | -112.82722 | 4980 | 777 |
| Opportunity | city | Kansas | United States | 42.59611 | -98.50083 | 1938 | 98 |
| Opportunity Farms | city | Missouri | United States | 38.23417 | -93.45778 | 856 | 828 |
| Opposition historical | city | Arkansas | United States | 36.22861 | -91.29583 | 396 | 932 |
| Ops | city | North Dakota | United States | 48.22778 | -97.59667 | 925 | 236 |
| Opstead | city | Minnesota | United States | 46.23389 | -93.47194 | 1348 | 784 |
| Optima | city | Oklahoma | United States | 36.75833 | -101.35583 | 3024 | 260 |
| Optimo | city | New Mexico | United States | 35.89028 | -104.80306 | 6351 | 33 |
| Optimus | city | Arkansas | United States | 36.04472 | -92.125 | 698 | 830 |
| Option | city | Pennsylvania | United States | 40.34639 | -79.97361 | 1102 | 149151 |
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