As with most indigenous ethnic groups in Borneo, culture revolves around rice; however, coconut and banana groves provide cash income.

Many Rungus now work in town, and have abandoned the communal life of the longhouse for modern Malaysian society.

Traditionally, this tribe practiced an indigenous belief system known as agama Labus, although some writers label it as aninism, with male priests or shamans called Rampahan and female priestesses called Bobolizan, nowadays most Rungus are now Christians belonging to the Protestant Church in Sabah (PCS) in the Lutheran tradition of Protestantism and although being an ethnic-based church, it consists mostly of Bahasa Malaysia-speaking congregations throughout Sabah as well as in Peninsular Malaysia and a mission church planted right in the Federal Territory of Labuan, with a large Muslim minority and smaller minorities of this tribe also adhere to other Christian denominations such as Roman Catholicism, Sidang Injil Borneo, Anglicanism, True Jesus Church and Seventh-day Adventism.

Considered one of the most traditional ethnic groups in Sabah, many Momogun Rungus live in longhouses, with each family having its own separate quarters off a common hall.

The traditional Rungus dress is black in colour, often with hundreds or even thousands of dollars worth of antique beads.

Traditionally all of the Rungus women wore heavy brass coils around their arms, legs and necks.

[1] The pinakol consists of a pair of flat beaded bandoleer-type belts worn crossed over the chest and back.

They make the discs out of plastic nowaday The tinggot is a short choker, either single beaded or with narrow beadwork.

The togkul is a necklace some 26 inches (66 cm) long with beads similar to the sandang but smaller and worn around the neck.

"Little brass rings and antique beads looped through thin strands of stripped bark (togung) becomes a wide and colorful hipband.

Being a community of fishermen and farmers, the staple foods of the Rungus people usually consists of rice and cassava, supplemented with green vegetables and fish.

[4] The cooked eggplant is peeled, and served with chillies, lime juice, toasted ikan bilis or salted fish, and sprigs of lompodos (a local variety of basil).

[5] Akin to the Latin American corn beer, Tinonggilan is a Rungus speciality and is usually served during festive occasions, or as refreshments for guests during the performance of a ritual dance called Mongigol Sumundai.