Being one of the scheduled tribes of Manipur state of India, Koireng has held in position of prominence, mostly found in foothills surrounding the Imphal valley. Various districts of Imphal namely, Senapati, Tarung are thronged with Koireng tribes. According to 1981 census, the Koireng population in Manipur is 603.

Koireng has an etymological significance. It has been derived from two words ,`Kol`, meaning east and `ren` which means men . Later they are known as `Korem` . However, they are enlisted in the Indian constitution as Koireng.

As far as their physical stature is concerned, Koireng tribes have got short height, dark brown skin, well-built body.

Regarding the origin of these Koireng tribes, two myths are popular amongst people. One story is related to emergence of two heterogemes human progenitors from non-human beings. The other story claims that these Koireng tribes came out of the cave, Khur.

Koireng tribal society is divided into clans like Songthu and Yeite. Chungnung (upper) and Noineng (lower) belong to the Songthu Clan. Norsel , Barreng , Ranglihon etc fall into the Yeite clan .

Although the Koireng is an exogamous society, it is interesting that intermarriage is prevalence between few of these groups of the Koireng clans.

Enrichment of the Koireng culture is reflected in their apparels and beautiful jewelries. Formal onthal, turbans like Puonwon, Murkisens are the dresses that the male wears while Ponsel, Saipikhup. Lungum Puonkokhoi are worn by the females . Also females use Ponlang, Koram as waist belts. Puonhem is a special dress for females thus ascribing them high status and prestige. Beautiful beaded ornaments like Har (armlet), Yakseir (armlet) is quite popular Especially Rikarui, which is made with red beads for decorating turbans is pretty popular. Khoireng use feathers of hen and fur of goat.

Being the agrarian society, the Koireng tribes practice fishing, ploughing etc in great extent. Quite a handful of Koireng tribes have flourished as good traders. For enjoyment, there are no dearth of dance and musical songs. Various musical instruments that are widely used are Rushem (Bagpipe), Khung (drum) Sekhi (horn) Sum (gong), Serangdar (violin like instrument)` etc. Special Koireng dance is held especially at the time of festivals and joyful functions.

These Koireng tribes practice mainly paganism. Only non-Christian seniors can become leaders. Also various traditional rules like imposing fines to the wrong doers also exist. Pathian is their main deity and in-Pathian is their house god. Marriages are either arranged or done by eloping. Very recently, conversion of youths to Christianity has become rampant.

Rituals, festivals, customs too embellishes the culture of Toireng tribes. Special rites are feted after childbirth. Nailuwoi is the naming ceremony, held on the third day of a birth. Other rituals of childbirth are also there. Theikal is a ceremony for strengthening limbs of the fifteen day old newly born child. Mason is held to recognize the child as human and allowed to wear earrings. Numerous social as well as religious festivals that are being held in Koireng society are as follows:
Bedal: It is a harvesting festival held during Jan-Feb. Crops are not grown before that.

Palchoi: It is a religious service to emancipate them from disasters.

Kangrai Mindai: It is a three days festival held in the month of May-June. On the first day, village elders worship (Yupanthaba) Pathian at the gate with wine along with pig, hen and a dog

Chaonlei: It is a divine service celebrated in `Inga` for favorable growing of crops. In the contemporary period, it is blended with `Charaikhei ritual` feted for good growing of crops. Other festivals include Tuikuong Khuor, Lamkir Lei, Chamer Sier, Chathar Lei, Lengwai, Chalam Kei.

Lamthel Lei deserves special mentioning, as it is a special type of village cleaning festival. At `Panthong`, the village seniors decorate the gate with creepers. Also folk song narrating the tales of legendary hero Neisong is hummed.