|Nickname(s): Osu Manu|
|Motto(s): obodo oma|
|Time zone||WAT (UTC+1)|
Orsu is an LGA (Local Government Area) and tribe in the Imo State of Nigeria. Orsu is also the name of the dialect of this people. They are an Igbo sub-group located west of Orlu town to south of Ozubulu, north of Oguta and in the general areas around Oru, Orsu, Orlu, Njaba, Ihiala, Nnewi south and Oguta LGAs.
Over the years, the identity of the Orsu and their unique dialect of Igbo is fading away and a more centralized form of Igbo is popular among Orsu speakers.
Orsu LGA is made up of several automonous communities including Imenyi Ihitenansa, Ama-na-Ogu Ihitenansa, Amadiaba, Ihitenansa, Amaruru, Assa Ubirielem, Eziawa, Umuhu Okabia, Orsu Ihiete Ukwa and so on
The origin of Orsu cannot really be ascertained but different clans trace their origin to various sources.
- Oru believed to be a brother to Igbo.
- Nri believed to be descendants of ancient Israelites
- Benin believed to have arrived as refugees from an ancient war
- Aro from Eastern Igbo
- Abam came with Aros
More than 70% of Orsu's believe they are Oru by descent. The most popular ancient Orsu is Olaudah Equiano.