| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Otta | city | Jammu and Kashmir | India | 32.88 | 74.99 | 1669 | 43810 |
| Otta | city | Lagunes | Cote D'Ivoire (Ivory Coast) | 5.89 | -4.34 | 288 | 3874 |
| Otta | city | Fukui | Japan | 35.62 | 135.98 | 328 | 13343 |
| Otta | city | Ogun | Nigeria | 6.69 | 3.23 | 167 | 352260 |
| Otta | city | Nigeria | 6.67 | 3.73 | 154 | 11407 | |
| Otta | city | Ogun | Nigeria | 6.73 | 4.00 | 193 | 9698 |
| Otta | city | Edo | Nigeria | 6.31 | 6.21 | 830 | 92095 |
| Otta | city | Oppland | Norway | 61.77 | 9.53 | 984 | 973 |
| Otta | city | Lisboa | Portugal | 39.11 | -8.99 | 219 | 6000 |
| Ottaasen | city | Hedmark | Norway | 61.75 | 11.13 | 1902 | 800 |
| Ottaba | city | Queensland | Australia | -27.15 | 152.38 | 830 | 0 |
| Ottach | city | Bayern | Germany | 48.70 | 13.09 | 1017 | 18336 |
| Ottachi | city | Shimane | Japan | 35.28 | 132.72 | 354 | 21978 |
| Ottachicho | city | Shimane | Japan | 35.28 | 132.72 | 354 | 21978 |
| Ottacker | city | Bayern | Germany | 47.64 | 10.33 | 2860 | 8418 |
| Ottag | city | Dolnoslaskie | Poland | 50.97 | 17.33 | 406 | 33015 |
| Ottaguda | city | Odisha | India | 18.87 | 82.40 | 1932 | 17923 |
| Ottahua | city | Ontario | Canada | 45.42 | -75.70 | 246 | 210946 |
| Ottai Kosu | city | Andhra Pradesh | India | 18.92 | 83.38 | 1820 | 20177 |
| Ottakring | city | Wien | Austria | 48.22 | 16.30 | 830 | 302868 |
| Ottal | city | Dagestan | Russia | 41.67 | 47.01 | 7549 | 1207 |
| Ottama | city | Pangasinan | Philippines | 15.95 | 120.50 | 137 | 78181 |
| Ottammal | city | Chungnam | Korea, Republic of (South) | 36.58 | 127.28 | 85 | 57278 |
| Ottana | city | Sardegna | Italy | 40.23 | 9.03 | 830 | 4017 |
| Ottange | city | Lorraine | France | 49.44 | 6.02 | 1669 | 28974 |
| Ottanola | city | North Carolina | United States | 35.39 | -82.28 | 2887 | |
| Ottapalam | city | Kerala | India | 10.77 | 76.38 | 173 | 175629 |
| Ottapanai | city | North Western | Sri Lanka | 7.82 | 79.78 | 16 | 19118 |
| Ottapanai Periya | city | North Western | Sri Lanka | 7.82 | 79.78 | 16 | 19118 |
| Ottapanai Sinna | city | North Western | Sri Lanka | 7.81 | 79.79 | 16 | 17255 |
| Ottapidaram | city | Tamil Nadu | India | 8.91 | 78.02 | 137 | 14752 |
| Ottappalam | city | Kerala | India | 10.77 | 76.38 | 173 | 175629 |
| Ottappidaram | city | Tamil Nadu | India | 8.91 | 78.02 | 137 | 14752 |
| Ottappuwa | city | North Central | Sri Lanka | 8.19 | 80.26 | 242 | 25546 |
| Ottappuwe | city | North Central | Sri Lanka | 8.19 | 80.26 | 242 | 25546 |
| Ottapuwe Galatabendiwewa | city | North Central | Sri Lanka | 8.19 | 80.26 | 242 | 25546 |
| Ottara | city | Meknes-Tafilalet | Morocco | 31.14 | -4.40 | 2509 | 1490 |
| Ottarp | city | Skane | Sweden | 55.95 | 12.92 | 141 | 7033 |
| Ottarsrud | city | Akershus | Norway | 59.69 | 10.66 | 196 | 9285 |
| Ottarsstadhir | city | Hofudhborgarsvaedhi | Iceland | 64.05 | -22.09 | 68 | 3024 |
| Ottasen | city | Hedmark | Norway | 61.75 | 11.13 | 1902 | 800 |
| Ottati | city | Campania | Italy | 40.47 | 15.32 | 1932 | 2531 |
| Ottau | city | Jihocesky Kraj | Czech Republic | 48.73 | 14.34 | 2007 | 4814 |
| Ottava | city | Ontario | Canada | 45.42 | -75.70 | 246 | 210946 |
| Ottavia | city | Lazio | Italy | 41.97 | 12.40 | 830 | 175696 |
| Ottaviano | city | Campania | Italy | 40.85 | 14.47 | 830 | 112597 |
| Ottawa | city | Ontario | Canada | 45.42 | -75.70 | 246 | 210946 |
| Ottawa | city | Jawa Tengah | Indonesia | -7.62 | 110.82 | 374 | 410690 |
| Ottawa | city | KwaZulu-Natal | South Africa | -29.67 | 31.04 | 68 | 229722 |
| Ottawa | city | Northern Cape | South Africa | -29.39 | 24.04 | 3763 | 149 |
| Ottawa | city | North West | South Africa | -25.64 | 23.37 | 3448 | 0 |
| Ottawa | city | Omaheke | Namibia | -22.27 | 18.42 | 5029 | 0 |
| Ottawa | city | Illinois | United States | 41.35 | -88.84 | 830 | |
| Ottawa | city | Iowa | United States | 41.03 | -93.59 | 1082 | |
| Ottawa | city | Iowa | United States | 41.31 | -93.50 | 830 | |
| Ottawa | city | Kansas | United States | 38.62 | -95.27 | 908 | |
| Ottawa | city | Kentucky | United States | 37.36 | -84.46 | 1200 | |
| Ottawa | city | Minnesota | United States | 44.38 | -93.95 | 849 | |
| Ottawa | city | Ohio | United States | 41.02 | -84.05 | 830 | |
| Ottawa | city | Oklahoma | United States | 36.86 | -94.79 | 859 | |
| Ottawa | city | Pennsylvania | United States | 41.08 | -76.70 | 830 | |
| Ottawa | city | West Virginia | United States | 37.96 | -81.82 | 1108 | |
| Ottawa | city | Wisconsin | United States | 42.98 | -88.45 | 1030 | |
| Ottawa | city | Michigan | United States | 41.77 | -83.52 | 830 | |
| Ottawa (Children's Hospital) Heliport | airport | 45.40 | -75.65 | 272 | 0 | ||
| Ottawa (Civic Hospital) Heliport | airport | 45.39 | -75.72 | 265 | 0 | ||
| Ottawa / Casselman (Shea Field) | airport | 45.30 | -75.17 | 216 | 0 | ||
| Ottawa / Dwyer Hill Heliport | airport | 45.13 | -75.95 | 325 | 0 | ||
| Ottawa / Embrun Airport | airport | 45.24 | -75.30 | 230 | 0 | ||
| Ottawa / Gatineau (Casino) Heliport | airport | 45.45 | -75.73 | 220 | 0 | ||
| Ottawa / Gatineau Seaplane Base | airport | 45.46 | -75.68 | 0 | |||
| Ottawa / Hull (Expressair) Heliport | airport | 45.46 | -75.74 | 180 | 0 | ||
| Ottawa / Manotick (Hope Field) | airport | 45.19 | -75.71 | 315 | 0 | ||
| Ottawa Bells Corners | city | Ontario | Canada | 45.32 | -75.83 | 282 | 60107 |
| Ottawa Brook | city | Nova Scotia | Canada | 45.97 | -60.92 | 387 | 0 |
| Ottawa Center | city | Michigan | United States | 43.03 | -86.03 | 830 | |
| Ottawa Estates | city | Georgia | United States | 32.13 | -81.29 | 19 | |
| Ottawa Hills | city | Ohio | United States | 41.66 | -83.64 | 830 | |
| Ottawa Junction | city | Kansas | United States | 38.63 | -95.27 | 908 |