| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Puerto Obaldia | city | Kuna Yala | Panama | 8.66 | -77.42 | 291 | 974 |
| Puerto Obaldia Airport | airport | 8.67 | -77.42 | 223 | 0 | ||
| Puerto Obaldía | city | Cocle | Panama | 8.30 | -80.27 | 0 | 3575 |
| Puerto Obligado | city | Buenos Aires | Argentina | -33.60 | -59.82 | 13 | 676 |
| Puerto Obligado | city | Itapua | Paraguay | -27.10 | -55.57 | 196 | 5086 |
| Puerto Obregon | city | Tabasco | Mexico | 18.53 | -92.65 | 3 | 19702 |
| Puerto Obscuro | city | Hidalgo | Mexico | 21.29 | -98.98 | 1669 | 13651 |
| Puerto Obscuro | city | Hidalgo | Mexico | 21.15 | -98.95 | 4189 | 10494 |
| Puerto Obscuro | city | Chihuahua | Mexico | 26.67 | -107.91 | 3503 | 601 |
| Puerto Obscuro | city | Guerrero | Mexico | 18.63 | -99.80 | 7857 | 5360 |
| Puerto Ocampo | city | Santa Fe | Argentina | -28.52 | -59.12 | 164 | 5133 |
| Puerto Ocapa | city | Junin | Peru | -11.15 | -74.31 | 1233 | 347 |
| Puerto Ocoi | city | Parana | Brazil | -25.22 | -54.47 | 830 | 443 |
| Puerto Ocopa | city | Junin | Peru | -11.15 | -74.31 | 1233 | 347 |
| Puerto Ocopa Airport | airport | -11.13 | -74.35 | 1217 | 0 | ||
| Puerto Octay | city | Los Lagos | Chile | -40.97 | -72.88 | 85 | 303 |
| Puerto Ocuca | city | Sonora | Mexico | 30.60 | -111.53 | 1896 | 0 |
| Puerto Oculto | city | Cesar | Colombia | 7.88 | -73.68 | 134 | 2823 |
| Puerto Ocumare | city | Aragua | Venezuela | 10.48 | -67.77 | 830 | 59329 |
| Puerto Odornez | city | Alto Parana | Paraguay | -25.75 | -54.63 | 830 | 1094 |
| Puerto Ojo de León | city | San Luis Potosi | Mexico | 22.43 | -99.56 | 5029 | 6728 |
| Puerto Olaya | city | Santander | Colombia | 6.47 | -74.39 | 232 | 7101 |
| Puerto Olivares | city | Meta | Colombia | 3.35 | -73.53 | 984 | 1631 |
| Puerto Olivares | city | Cordillera | Paraguay | -25.00 | -57.30 | 187 | 3477 |
| Puerto Olivia | city | Loreto | Peru | -3.23 | -74.63 | 830 | 0 |
| Puerto Olivo | city | Meta | Colombia | 2.89 | -73.22 | 984 | 596 |
| Puerto Oporto | city | Pando | Bolivia | -9.93 | -66.42 | 830 | 8 |
| Puerto Ordasas | city | Bolivar | Venezuela | 8.30 | -62.72 | 26 | 27509 |
| Puerto Ordaz | city | Bolivar | Venezuela | 8.30 | -62.72 | 26 | 27509 |
| Puerto Ordaz and San Felix | city | Bolivar | Venezuela | 8.30 | -62.72 | 26 | 27509 |
| Puerto Ordóñez | city | Alto Parana | Paraguay | -25.75 | -54.63 | 830 | 1094 |
| Puerto Orellana | city | Pasco | Peru | -9.84 | -74.88 | 830 | 149 |
| Puerto Oriente | city | Vichada | Colombia | 4.03 | -70.87 | 380 | 0 |
| Puerto Oriente | city | Tamaulipas | Mexico | 26.30 | -98.95 | 328 | 1687 |
| Puerto Oriente | city | Loreto | Peru | -7.00 | -75.10 | 830 | 211 |
| Puerto Orla | city | Veraguas | Panama | 7.95 | -81.20 | 72 | 1532 |
| Puerto Orlas | city | Veraguas | Panama | 7.95 | -81.20 | 72 | 1532 |
| Puerto Oro Verde | city | Misiones | Argentina | -26.86 | -55.13 | 830 | 3694 |
| Puerto Ortiz | city | Morona-Santiago | Ecuador | -3.01 | -77.90 | 1669 | 308 |
| Puerto Oscuro | city | Coquimbo | Chile | -31.41 | -71.57 | 830 | 388 |
| Puerto Oscuro | city | Mexico | Mexico | 18.67 | -99.79 | 7709 | 5859 |
| Puerto Ospina | city | Putumayo | Colombia | 0.13 | -75.85 | 830 | 132 |
| Puerto Ospina | city | Antioquia | Colombia | 7.54 | -75.34 | 830 | 1504 |
| Puerto Ospina | city | Guaviare | Colombia | 2.48 | -72.41 | 967 | 149 |
| Puerto Otero | city | Vaupes | Colombia | 0.94 | -71.19 | 830 | 0 |
| Puerto Oyaque | city | Madre de Dios | Peru | -11.42 | -69.43 | 830 | 301 |