| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obad historical | city | Ohio | United States | 38.9625 | -82.37472 | 669 | 2044 |
| Obadiah | city | Mississippi | United States | 32.51222 | -88.72667 | 498 | 2688 |
| Oban | city | California | United States | 34.77444 | -118.14722 | 2296 | 10494 |
| Obar | city | New Mexico | United States | 35.535 | -103.20083 | 4097 | 98 |
| Obear historical | city | Arkansas | United States | 35.715 | -90.84333 | 246 | 860 |
| Obed | city | Illinois | United States | 39.56528 | -88.9025 | 698 | 1270 |
| Obed Junction | city | Tennessee | United States | 36.07944 | -84.76389 | 1099 | 1537 |
| Obed River Estates | city | Tennessee | United States | 35.93333 | -85.09444 | 1801 | 5655 |
| Obed historical | city | South Carolina | United States | 35.15306 | -82.09333 | 997 | 5582 |
| Obeeville | city | Kansas | United States | 38.0575 | -97.84861 | 1532 | 15926 |
| Obelisk | city | Pennsylvania | United States | 40.28806 | -75.51167 | 278 | 16831 |
| Ober | city | Indiana | United States | 41.27083 | -86.52444 | 731 | 2163 |
| Oberg historical | city | California | United States | 34.43333 | -118.5925 | 1102 | 28844 |
| Oberlin | city | Kansas | United States | 39.81833 | -100.52778 | 2559 | 1880 |
| Oberlin | city | Oklahoma | United States | 33.87361 | -95.85139 | 456 | 626 |
| Oberlin | city | Louisiana | United States | 30.62 | -92.7625 | 62 | 1438 |
| Oberlin | city | Michigan | United States | 44.07444 | -84.50611 | 895 | 2184 |
| Oberlin | city | Ohio | United States | 41.29389 | -82.2175 | 797 | 12949 |
| Oberlin | city | North Carolina | United States | 35.79861 | -78.65333 | 298 | 144251 |
| Oberlin | city | Pennsylvania | United States | 40.24139 | -76.815 | 498 | 69049 |
| Oberlin Beach | city | Ohio | United States | 41.38278 | -82.50778 | 593 | 6121 |
| Oberlin Gardens | city | Pennsylvania | United States | 40.24361 | -76.82278 | 498 | 69049 |
| Oberlin historical | city | Michigan | United States | 44.69306 | -86.22 | 593 | 2258 |
| Oberlochen | city | Georgia | United States | 33.78778 | -84.79639 | 1003 | 14181 |
| Oberly Crossing | city | Texas | United States | 29.91972 | -98.5875 | 1246 | 853 |
| Obernburg | city | New York | United States | 41.84472 | -75.0075 | 1853 | 1372 |
| Oberon | city | North Dakota | United States | 47.92306 | -99.20361 | 1597 | 307 |
| Oberry | city | Georgia | United States | 31.385 | -82.98083 | 259 | 1515 |
| Obert | city | Kansas | United States | 42.68972 | -97.02778 | 1348 | 584 |
| Obetz | city | Ohio | United States | 39.87889 | -82.95083 | 705 | 95793 |
| Obey City | city | Tennessee | United States | 36.17361 | -85.16806 | 1601 | 1191 |
| Obi | city | New York | United States | 42.08639 | -78.25806 | 1601 | 2828 |
| Obids | city | North Carolina | United States | 36.30833 | -81.38722 | 3083 | 1821 |
| Obie | city | California | United States | 41.16972 | -121.71361 | 4563 | 231 |
| Obin historical | city | Arkansas | United States | 34.40944 | -92.30806 | 305 | 832 |
| Obion | city | Tennessee | United States | 36.25889 | -89.19167 | 275 | 2219 |
| Oblong | city | Illinois | United States | 39.00194 | -87.90889 | 505 | 2543 |
| Obregon | city | California | United States | 32.85806 | -114.78833 | 918 | 42 |
| Obregon | city | Texas | United States | 31.72194 | -99.23222 | 1597 | 690 |
| Obrero | city | Puerto Rico | United States | 18.47472 | -66.7425 | 36 | 23980 |
| Obrero | city | Puerto Rico | United States | 18.43611 | -66.05278 | 6 | 264480 |
| Obretch Estates | city | Maryland | United States | 39.37583 | -76.98694 | 501 | 21166 |
| Observatory Heights subdivision | city | Maryland | United States | 39.13833 | -77.20028 | 498 | 133826 |
| Obsidian | city | Idaho | United States | 44.07889 | -114.84639 | 6797 | 14 |
| Obtuse Hill | city | Connecticut | United States | 41.46639 | -73.36194 | 498 | 15418 |
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