| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| O'Connor | city | Kansas | United States | 41.51056 | -98.47361 | 1975 | 229 |
| O'Fallons | city | Kansas | United States | 41.16028 | -101.07667 | 2919 | 218 |
| O'Neill | city | Kansas | United States | 42.45778 | -98.64722 | 1998 | 2624 |
| Oak | city | Kansas | United States | 40.23694 | -97.90306 | 1587 | 243 |
| Oak Mill | city | Kansas | United States | 40.22583 | -97.87556 | 1581 | 243 |
| Oakdale | city | Kansas | United States | 42.06972 | -97.96889 | 1751 | 643 |
| Oakland | city | Kansas | United States | 41.83583 | -96.46667 | 1315 | 759 |
| Obert | city | Kansas | United States | 42.68972 | -97.02778 | 1348 | 584 |
| Oconee | city | Kansas | United States | 41.47 | -97.51861 | 1489 | 1461 |
| Oconto | city | Kansas | United States | 41.14111 | -99.76278 | 2595 | 112 |
| Octavia | city | Kansas | United States | 41.34806 | -97.05861 | 1433 | 889 |
| Odell | city | Kansas | United States | 40.05 | -96.80306 | 1282 | 453 |
| Odessa | city | Kansas | United States | 40.70167 | -99.25639 | 2211 | 565 |
| Ogallala | city | Kansas | United States | 41.12806 | -101.71917 | 3179 | 4420 |
| Ohiowa | city | Kansas | United States | 40.41444 | -97.4525 | 1601 | 467 |
| Olean | city | Kansas | United States | 41.56083 | -98.80722 | 2076 | 307 |
| Olean | city | Kansas | United States | 41.73611 | -96.945 | 1551 | 931 |
| Oliver | city | Kansas | United States | 41.22944 | -103.7875 | 4780 | 716 |
| Omaha | city | Kansas | United States | 41.25861 | -95.9375 | 1007 | 151465 |
| Omaha Regency | city | Kansas | United States | 41.26944 | -96.18556 | 1105 | 36750 |
| Ong | city | Kansas | United States | 40.39861 | -97.83556 | 1676 | 470 |
| Opportunity | city | Kansas | United States | 42.59611 | -98.50083 | 1938 | 98 |
| Orafino | city | Kansas | United States | 40.49722 | -100.22861 | 2477 | 145 |
| Orchard | city | Kansas | United States | 42.33556 | -98.2425 | 1968 | 238 |
| Ord | city | Kansas | United States | 41.60333 | -98.92583 | 2083 | 1801 |
| Oreapolis | city | Kansas | United States | 41.0475 | -95.91806 | 967 | 14381 |
| Orella | city | Kansas | United States | 42.89333 | -103.5 | 3697 | 86 |
| Orleans | city | Kansas | United States | 40.12917 | -99.455 | 2050 | 399 |
| Orum | city | Kansas | United States | 41.54583 | -96.27028 | 1335 | 985 |
| Osceola | city | Kansas | United States | 41.17972 | -97.54722 | 1630 | 523 |
| Oshkosh | city | Kansas | United States | 41.405 | -102.34389 | 3392 | 56 |
| Osmond | city | Kansas | United States | 42.36 | -97.59639 | 1663 | 484 |
| Otis Motel and Trailer Court | city | Kansas | United States | 42.80472 | -102.20278 | 3599 | 327 |
| Otoe | city | Kansas | United States | 40.72361 | -96.11667 | 1125 | 746 |
| Ough | city | Kansas | United States | 40.32222 | -101.51222 | 3336 | 133 |
| Overland | city | Kansas | United States | 41.0775 | -97.98583 | 1699 | 2477 |
| Overton | city | Kansas | United States | 40.73861 | -99.53722 | 2312 | 275 |
| Ovina | city | Kansas | United States | 40.96861 | -98.455 | 1889 | 4664 |
| Owasco | city | Kansas | United States | 41.23944 | -103.57444 | 4639 | 559 |
| Oxford | city | Kansas | United States | 40.24833 | -99.63306 | 2122 | 362 |
| Oxford Junction | city | Kansas | United States | 40.235 | -99.59861 | 2096 | 233 |
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