Koloamatangi is a surname. Notable people with the surname include:
Keaon Koloamatangi (born 1998), Tongan rugby league player Leo Koloamatangi (born 1994), American football player Meffy Koloamatangi (born 1995), American gridiron player Tau Koloamatangi (born 1995), New Zealand rugby union player Tautuiaki Taula Koloamatangi (born 1991), American professional wrestler Tevita Koloamatangi (born 1988), New Zealand rugby union player