Aguleri listen^ⓘ is a medium-sized town situated in the Anambra Valley in southeastern Nigeria, a country on the west coast of Africa. It is the largest town in the Anambra East local government area of Anambra State. It is the town of the newly established Roman Catholic Diocese of Aguleri.

Aguleri is bordered by Umueri, Anam, and Nando to the west; Anaku, Omor, Ifite Ogwari, Igbakwu, and Umueje to the east; Iggah, Ojjor, Asaba, and Ogwurugwu communities of Uzo Uwani LGA in Enugu State to the south; and Obele, Odeke, and Eshonwa communities of Ibaji LGA in Kogi State to the north. Census figures estimate the population of Aguleri to be close to 3 Million people. The town covers an area of approximately 480 square kilometers.

The ruling family of Aguleri is the Idigo family, whose dynasty has lasted for over ten decades. The current king is HRM Michael Chukwuneme Idigo V, (Ezeudo I).

According to oral tradition, the origin of Aguleri is traced to a man named Eri 4500 BC. Eri is said to have settled at the bank of the river, where he established an altar of onyx at the confluence of the Ezu and Omabala rivers. ^{[citation needed]} Due to annual flooding, Eri relocated inland to Eri-aka near the Odanduli stream, and eventually to the site where he established Obu Uga (Obu-Gad).

Eri had several children: Agulu (Aguleri), Attah, Oba, Menri, and Adamgbo (Iguedo, his only daughter). All of Eri's children lived together with him in Aguleri until his death, after which they dispersed to found different kingdoms. Attah, the second son, left to establish the Igala kingdom, while Oba moved on to found the Benin kingdom. Menri later departed Aguleri to establish the Nri kingdom. Eri's eldest son, Agulu-eri (Aguleri), remained behind and inherited his father's land, expanding the kingdom. Aguleri had three wives: Ada, Omali, and Eke, and fathered four sons: Ivite, Igboezunu, Enugwu, and Eziagulu.

Ada, the first wife, did not conceive initially. Agulu (Aguleri) subsequently married Omali, his second wife, who bore him a son named Ivite (first son). Later, Ada gave birth to a son named Igboezunu (second son). Agulu (Aguleri) then married his third wife, Eke, with whom he had two sons: Enugwu (third son) and Eziagulu (fourth son). These three wives of Aguleri formed Akwukwonato.

Aguleri is currently divided into three main quarters: Igboezunu, Ivite, and Enugwu na Eziagulu (Ugwu na Adegbe), with component families present in both Aguleri Uno and Aguleri Otu.

In Igbo culture, property inheritance follows the birth order, with the first child having the first choice of property.^{[citation needed]} Therefore, the villages in Aguleri include: Homeland (Enuobodo), Igboezunu-otu, Ivite-otu, Eziagulu-otu, Enugu-otu, generally known as Aguleri-otu, which is situated in the lower part of the Omambala River.^{[clarification needed]}