Arochukwu is today made up of nineteen Ogos (villages or city states) some of these Ogos have grown from being mere vigilante camps established at borders with Ibibio land by the Aro Nation State, to maintain territorial integrity of the nation state. These camps grew into homestead as the young guards settled down to marry and acquire households. These new homesteads acquired autonomous city state status as their population grew. Some of these new city states were named after the principal family head, some took their names from specifics of their location, some were given names of existing Igbo communities for reasons lost in history and others acquired names from the characteristics of their founding.

These city-States are:
Agbagwu: - Named solely after Agba, the son of Agwu Inobia.

Amanagwu: - City State of Agwu Inobia, one of the founding fathers of
the confederacy.

Amangwu: - City State of Ngwu, the son of Eze Jaka

Amanuwu: - City State of Oke Nnachi’s second son. Not quite certain
how the name of the place was derived.

Amasu: - Named after a river port (Ama asu)

Amaukwa: - City State of Ukwa, one of the grandsons of Agwu Inobia

Amoba: - City State of one of the grandsons of Agwu Inobia.

Amuvi: - Part of Umu Oti Asaga, then resident in Amamgba as
Ugwuogo family unit. Population pressure on land made them to move to the highland further north of Asaga, across the Nwanne flood plain.

Asaga: - The then northern terminal of Aro town and the entreport of all travelers using the ancient Bende trade route

Atani: - A city State name common among the Igbos, Just like the
name Asaga. Note that its usual full nomenclature of Atani-Aro implies the existence of other Atani’s.
Ibom: - This is the Ibibio name for the landmass now partly occupied by Aro. It was once their homeland during their migratory period 300 AD to 1750 AD from east of the Cross River in the Ekoi territory. They were classified in early European records as the Akpa People, because their popular ivory merchant king was named Akpa. The Ibom city state of Aro took on this name from its founding by Ibom-Akpa elements of Osim/Akuma Nnubi Kindred.
Isinkpu: - The City State of Nkpu, the son of Eze Jaka, the founder of Isinkpu.
Obinkita: - The Igbo corruption of Obot Okon Ita, the original capital City of Obong Okon Ita.
Oror: - The city state of Oror, son of Eze Obin of Agbagwu
Ugbo: - A city State of one of the Agwu Ibobia’s grandsons.
Ugwuakuma:- A city state of Akuma Nnubi surviving sibling of Osim the Akpa merchant/warrior prince who lost his life in the Ibibio war.
Ugwuaro: - A city state named after the hill of Avor Ukwu
Ujari: - More of the same naming categorization as Atani Aro and Asaga.
Utughugwu: - Un-satisfactorily ascribed to be a corruption of Ututu-Ugwu. No alternatively justifiable derivative has been proffered.