55,000 (2009 PCS). Ethnic population: 60,000.
Sabah, Kudat and Bengkoka peninsulas surrounding Marudu bay; Marudu district south of Marudu bay; Labuk-Sugut district southeast of Marudu bay.
Gandahon, Gonsomon, Nuluw, Pilapazan (Central Rungus, Rungus Tanga). Gonsomon and Nuluw most distinctive dialects. Gandahon is less distinct. Lexical similarity among dialects within 86%–96%.
Reside on 2 peninsulas surrounding a bay and identify themselves by which side of the bay they come from. Self-identify as Momogun and have complex internal social and ethnic relationships (Appell 1965). There is a strong sense of Rungus ethnic identity across all dialect groups.