UpAlphabetical listing of Places in Porto
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|
| Oldroes | city | Porto | Portugal | 41.15 | -8.30 | 830 | 35069 |
| Olival | city | Porto | Portugal | 41.05 | -8.54 | 830 | 85688 |
| Oliveira | city | Porto | Portugal | 41.26 | -8.20 | 830 | 35411 |
| Oliveira do Douro | city | Porto | Portugal | 41.12 | -8.58 | 85 | 341582 |
| Oliveiras | city | Porto | Portugal | 41.18 | -8.58 | 351 | 413404 |
| Olo | city | Porto | Portugal | 41.30 | -8.01 | 1669 | 9689 |
| Oporto | city | Porto | Portugal | 41.15 | -8.61 | 314 | 453046 |
| Ordem | city | Porto | Portugal | 41.28 | -8.31 | 856 | 53988 |
| Ordins | city | Porto | Portugal | 41.14 | -8.35 | 1125 | 27593 |
| Ouro | city | Porto | Portugal | 41.15 | -8.65 | 0 | 395053 |
| Outeiro | city | Porto | Portugal | 41.13 | -7.98 | 830 | 15605 |
| Outeiro | city | Porto | Portugal | 41.19 | -8.54 | 830 | 247764 |
| Outeiro | city | Porto | Portugal | 41.15 | -8.42 | 295 | 31641 |
| Outeiro | city | Porto | Portugal | 41.24 | -8.63 | 328 | 165954 |
| Outeiro | city | Porto | Portugal | 41.08 | -8.54 | 396 | 109012 |
| Outeiro | city | Porto | Portugal | 41.18 | -8.11 | 866 | 21959 |
| Outeiro | city | Porto | Portugal | 41.44 | -8.72 | 308 | 36116 |
| Outeiro Maior | city | Porto | Portugal | 41.37 | -8.66 | 193 | 21593 |
| Outoreca | city | Porto | Portugal | 41.17 | -8.01 | 2519 | 9635 |
| Ovelhinha | city | Porto | Portugal | 41.25 | -8.03 | 830 | 16766 |
| Ovil | city | Porto | Portugal | 41.19 | -8.01 | 1860 | 8400 |
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