Effium is the largest autonomous Igbo community in Ebonyi State of southeast region, Nigeria. Effium is located in the Ohaukwu local government area of Ebonyi State. The indigenous people are known as Effiom and Ezza Effium, but the most spoken indigenous language is the Ezza language.

The major occupation in Effium is agriculture. The major agricultural produce include: yam, cassava, rice, groundnut, palm oil and timbers.

Effium community has other minor communities which includes: Inikiri Umuezeoka, Umuezeokaoha, and Kpakpaji communities.

The first tribe that settled in Effium were the Effium people then they accomdated the Ezza followed by Arochukwu, Amuda and others.

Effium as a community has no common culture because it is inhabited by two different tribes with different cultures.

Effium shares common boundaries with Izzi, Ngbo, Uli and Igumale.

It has a very large market popularly known as Nwafia Effium market or Effium main market among many others where agricultural commodities are purchased in large quantities and transported to other parts of the country and for export. It is one of the largest markets in Ebonyi State, Nigeria. Other markets in Effium include Inikiri Bernard market and Nwekendiagu market.

Lists of villages in Nigeria Ebonyi State