Tupua Tamasese Tupuola Tufuga Efi, also known as Tuiatua Tupua Tamasese Efi, and formerly known as Tupuola Efi, is a Samoan political figure who was Samoa's head of state from 2007 to 2017. Previously he was Prime Minister of Samoa from 1976 to 1982 and again later in 1982.
On 16 June 2007 he was elected as O le Ao o le Malo, Samoa's head of state, for a five-year term. He was sworn in as O le Ao o le Malo at Samoa's Parliament (Fono) on 20 June 2007.
He is a member of one of the paramount Families of State (Aiga Tupu) where he holds the Tama-a-Aiga Tupua title of the SaTupua 'royal' family. He also holds the honorific title of "Tui Atua".
Tupua first entered parliament and became Prime Minister under the title Tupuola.