| Rank | Coordinates | City / town | Department | Population
(2007 census) | | 1 | 4|16|4|S|15|17|31|E|type:city|format=dms|name=Brazzaville}} | Brazzaville | Brazzaville | {{nts|1373382}} |
| 2 | 04|46|43|S|11|51|49|E|type:city|format=dms|name=Pointe-Noire}} | Pointe-Noire | Pointe-Noire | {{nts|715334}} |
| 3 | 4|11|59|S|12|40|26|E|type:city|format=dms|name=Pointe-Dolisie}} | Dolisie | Niari | {{nts|83798}} |
| 4 | 4|9|56|S|13|17|34|E|type:city|format=dms|name=Nkayi, Republic of the Congo}} | Nkayi | Bouenza | {{nts|71620}} |
| 5 | 3|43|39|S|14|31|16|E|type:city|format=dms|name=Kindamba}} | Kindamba | Pool | {{nts|59880}} |
| 6 | 1|38|17|N|18|04|00|E|type:city|format=dms|name=Impfondo}} | Impfondo | Likouala | {{nts|33911}} |
| 7 | 1|36|49|N|16|03|06|E|type:city|format=dms|name=Ouésso}} | Ouésso | Sangha | {{nts|28179}} |
| 8 | 04|09|13|S|13|33|00|E|type:city|format=dms|name=Madingou, Bouenza}} | Madingou | Bouenza | {{nts|25713}} |
| 9 | 0|29|S|15|54|E|type:city|format=dms|name=Owando}} | Owando | Cuvette | {{nts|24736}} |
| 10 | 3|41|9|S|13|20|45|E|type:city|format=dms|name=Sibiti}} | Sibiti | Lékoumou | {{nts|22951}} |
| 11 | 4|17|46|S|13|51|03|E|type:city|format=dms|name=Loutété}} | Loutété | Bouenza | {{nts|19212}} |
| 12 | 4|13|7|S|13|45|42|E|type:city|format=dms|name=Bouansa}} | Bouansa | Bouenza | {{nts|19064}} |
| 13 | 2|4|38|S|14|41|9|E|type:city|format=dms|name=Gamboma}} | Gamboma | Plateaux | {{nts|18514}} |
| 14 | 1|13|35|S|16|46|58|E|type:city|format=dms|name=Mossaka District}} | Mossaka | Cuvette | {{nts|15112}} |
| 15 | 04|16|06|S|14|23|02|E|type:city|format=dms|name=Mindouli}} | Mindouli | Pool | {{nts|14541}} |
| 16 | 1|9|54|S|15|58|12|E|type:city|format=dms|name=Oyo, Republic of the Congo}} | Oyo | Cuvette | {{nts|14295}} |
| 17 | 0|00|N|15|38|E|type:city|format=dms|name=Makoua}} | Makoua | Cuvette | {{nts|14240}} |
| 18 | -4.161|13.048|type:city|format=dms|name=Loudima}} | Loudima | Bouenza | {{nts|14130}} |
| 19 | 2|57|02|S|12|43|34|E|type:city|format=dms|name=Mossendjo}} | Mossendjo | Niari | {{nts|13238}} |
| 20 | 3|59|S|13|55|E|type:city|format=dms|name=Mouyondzi}} | Mouyondzi | Bouenza | {{nts|12695}} |
| 21 | 3|05|N|18|32|E|type:city|format=dms|name=Bétou}} | Bétou | Likouala | {{nts|11240}} |
| 22 | 2|32|41|S|14|45|12|E|type:city|format=dms|name=Djambala}} | Djambala | Plateaux | {{nts|10652}} |
| 23 | Pokola | Sangha | {{nts|10465}} |
| 24 | Ngo | Plateaux | {{nts|10121}} |
| 25 | 04|08|34|S|12|54|49|E|type:city|format=dms|name=Makabana}} | Makabana | Niari | {{nts|9286}} |
| 26 | 4|21|41|S|14|45|52|E|type:city|format=dms|name=Kinkala}} | Kinkala | Pool | {{nts|8600}} |
| 27 | 0|52|S|14|49|E|type:city|format=dms|name=Ewo}} | Ewo | Cuvette-Ouest | {{nts|8142}} |
| 28 | 0|01|N|14|54|E|type:city|format=dms|name=Etoumbi}} | Etoumbi | Cuvette-Ouest | {{nts|7719}} |
| 29 | 1|1|39|S|15|21|33|E|type:city|format=dms|name=Boundji}} | Boundji | Cuvette | {{nts|7085}} |
| 30 | 2|3|N|18|3|E|type:city|format=dms|name=Dongou}} | Dongou | Likouala | {{nts|7060}} |
| 31 | Komono | Lekoumou | {{nts|6354}} |
| 32 | 0|04|S|14|30|E|type:city|format=dms|name=Kellé}} | Kellé | Cuvette-Ouest | {{nts|6298}} |
| 33 | 2.813|18.013|type:city|format=dms|name=Enyellé}} | Enyellé | Likouala | {{nts|6027}} |
| 34 | Tchamba-Nzassi | Kouilou | {{nts|5962}} |
| 35 | Ollombo | Plateaux | {{nts|5420}} |
| 36 | 1|5|48|S|16|57|55|E|type:city|format=dms|name=Loukoléla}} | Loukoléla | Cuvette | {{nts|5268}} |
| 37 | 1|38|53|S|14|34|50|E|type:city|format=dms|name=Sembé}} | Sembé | {{nts|4957}} |
| 38 | 2|06|S|12|52|E|type:city|format=dms|name=Mbinda}} | Mbinda | {{nts|4390}} |
| 39 | 2|51|S|13|50|E|type:city|format=dms|name=Zanaga}} | Zanaga | {{nts|4117}} |
| 40 | 2|19|31|S|14|36|0|E|type:city|format=dms|name=Lekana}} | Lekana | {{nts|4039}} |
|