Akoko land is sure an interesting region rich in diversity in culture and language. The entire Akoko region is populated by well over a million people. It's made up of dozens of different tight-knit communities spread accross 4 states in 3 different geopolitical zones of Nigeria. The Greater Akoko region is not just limited to Ondo and Edo states; it also include parts of Kogi and Ekiti state, specifically Ogori-Magongo and parts of Ijumu local government area of Kogi state, as well as parts of Ekiti East Local Government Area of Ekiti state. These three local governments area form a contiguous boundary with the main bulk of the Akoko population in Ondo and Edo state.

My focus is specially concerning the Akoko Ondo region and a few neighboring groups which holds the majority of the Akoko population. These groups have a trial ethnic identity of not only theier respective ethno-linguistic communities, but also the larger Akoko umbrella identity and the broader Yoruba identity. I couldn't find a list or map that represent the people well, so I took it upon myself to accurately highlight the area to the best of my abilities. While acknowledging the immense diversity in the Akoko region, I have simplified the ethnic breakdown based on affiliation of the communities and the similarities in the dialects. All Akoko groups speak one branch of the Volta-Niger languages with the common lingua franca of the people being Yoruba.
There are roughly ten native ethno-linguistic groups that make up Akoko Ondo and a few surrounding communities and they can be categorize further into 5 main bodies.

YORUBA (YORUBOID
No doubt, the Yorubas for the largest group in Akoko Ondo region. The largest town in the region, Ikare is inhabited by them, as well as many other large towns in the area. There are two Yoruba subgroups found in Akoko region: The Ekitis and the Akokos.

1.) Akoko Yoruba
The largest Yoruba subgroup and largest entity in Akoko are the Akoko Yoruba speaking people. Out of the 4 local government areas ( Akoko NW, NE, SW, SE) that make up Akoko Ondo, they largely occupy 3 of them. They can be found in Akoko SW and Akoko NE where they form the majority of the population as well as the Southern half of Akoko SE. The Akoko Yoruba dialect is a South Eastern (SEY) Yoruba dialect that is similar to other SEY dialects (Owo, Ondo, Ikale, Ijebu etc). The major towns inhabited by the Akoko Yoruba include Ikare, Oka, Akungba, Supare, Boropa, Ipesi, Sosan, Ifira, Idoani, and Imeri.
The Akoko dialect is considered one of the closest Yoruba dialect to the original Proto-Yoruba.
I want to note that the town of Imeri used to be part of Edo state until it was ceded to Ondo state (Osse LGA) only a few years ago after boundary readjustment.
I also want to mention that the town of Idoani is still part of the Akoko region, it just happens to fall politically in Osse Local Government Area. Idoani kingdom is a confederacy that is comprised of 6 different people with different historical backgrounds similarly to Abeokuta in ways. These 6 groups are Amusigbo, Iyayu, Isure, Okedo, Ako and Owani. I want to note that the Owani quarter is actually not in Idoani town itself. Owani quarter is a separate town known as Idosale. Yoruba is spoken natively in Idosale (Owani) and most Idoani quarters of Isure, Amusigbo, etc. The most distinct quarter where Yoruba isn’t spoken natively is the Iyayu quarters of Idoani.
2.) Ekiti Yoruba
Even though majority of Ekiti people live in Ekiti state, Ekiti people can also be found in surrounding states like Kwara and Ondo. In Akoko, the Ekiti Yorubas can be found in Western parts of Akoko NW. Their major towns are Eriti, irun, and Ogbagi. Ekiti people speak a Central Yoruba (CY) dialect similar to Akure, Ijesha, Igbomina, etc.