Tuatagaloa is both a given name and a surname. Notable people with the name include:
Tuatagaloa Leutele Te'o (1908–1980), Western Samoan high chief Belgium Tuatagaloa (born 1989), New Zealand rugby union player Mata Tuatagaloa, Samoan judge Natu Tuatagaloa (born 1966), American football player Taimalelagi Fagamalama Tuatagaloa-Leota, Samoan Anglican archdeacon