| Name | Population | Latitude/Longitude |
| 1 | Libreville , Estuaire |
846,090 |
0.392 / 9.454 |
| 2 | Port-Gentil , Ogooué-Maritime |
164,018 |
-0.719 / 8.782 |
| 3 | Franceville , Haut-Ogooué |
132,895 |
-1.633 / 13.584 |
| 4 | Owendo , Estuaire |
95,313 |
0.291 / 9.505 |
| 5 | Oyem , Woleu-Ntem |
72,939 |
1.6 / 11.579 |
| 6 | Moanda , Haut-Ogooué |
71,099 |
-1.567 / 13.199 |
| 7 | Nkan , Estuaire |
62,445 |
0.391 / 9.761 |
| 8 | Lambaréné , Moyen-Ogooué |
46,605 |
-0.7 / 10.241 |
| 9 | Mouila , Ngouni |
43,342 |
-1.868 / 11.056 |
| 10 | Akanda, Estuaire |
41,524 |
0.607 / 9.329 |
| 11 | Tchibanga , Nyanga |
36,108 |
-2.933 / 10.982 |
| 12 | Bitam , Woleu-Ntem |
33,561 |
2.076 / 11.501 |