| Language | Cluster | Dialects | Alternate spellings | Own name for language | Endonym(s) | Other names (location-based) | Other names for language | Exonym(s) | Speakers | Location(s) |
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| Ịka | | Agbor (standard form) | Ìḳá | | | Agbor | | | | Delta State, Ika and Orhionmwon LGAs |
| Enuani | | Akwukwu-Igbo, Illah, Ebu, Okpanam, Atuma, Ukala-Okpunor, Ukala-Okwute, Ogbe-Onihe, Asaba, Oko-Amakom, Oko-Anala, Okwe,Igbuzo, Ogwashi-Uku, Ubulu-Uku, Ubulu-Okiti, Ubulu-Unor, Ubulu-Ogume, Ubulu-Isiogogo, Onicha-Olona, Onicha-Ugbo, Onicha-Uku, Idumuje-Unor, Idumuje-Ugboko, Issele-Uku, Issele-Azagba… | Enuani | | | | | | | Delta State, Oshimili (North/South), Aniocha (North/South) LGAs |
| Ikwere | | Northern dialects: Elele, Apanị, Ọmerelu, Ubima, Isiokpo, Ọmagwa (Ọmegwa), Ipo, Ọmudioga, Ọmuanwa, Igwuruta, Egbeda, Alụu, Ịbaa; Southern dialects: Akpọ–Mgbu–Tolu, Ọbio, Ọgbakiri, Rụmuji, Ndele, Emọhua | Ikwerre | | Ìwhuruò`hnà | | | | 54,600 (1950 F&J);[4] possibly 200,000 (SIL) | Rivers State, Ikwerre, Emohua,Port Harcourt and Obio–Akpor LGAs |
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| Ogbah | | Egnih (East Ogbah), South Ogbah, West Ogbah | Ogba | | | | | | 22,750 (1950 F&J) | Rivers State, Ahoada LGA |
| Ẹkpẹyẹ | | According to clan names: Ako, Upata, Ubye, Igbuduya | | | | | Ekpeye, Ekpabya (by Abua), Ekkpahia, Ekpaffia | | 20,000 (1953); 50,000 (1969 Clark)[5] | Rivers State, Ahoada LGA |
| Ụkwuanị–Aboh–Ndọnị cluster | Ụkwuanị–Aboh–Ndọnị | | | | | | | | 150,000 (SIL) | Delta State, Ndokwa LGA; Rivers State, Ahoada LGA |
| Ụkwuanị | Ụkwuanị–Aboh–Ndọnị | Utaaba, Emu, Abbi, Obiaruku | Ukwani, Ukwali, Kwale | | | | | | | Delta State, Ndokwa LGA |
| Aboh | Ụkwuanị–Aboh–Ndọnị | | Eboh | | | | | | | Delta State, Ndokwa LGA |
| Ndọnị | Ụkwuanị–Aboh–Ndọnị | | | | | | | | | Rivers State, Ahoada LGA |