Ātua is an ancient political district of Samoa, consisting of most of the eastern section of Upolu and the island Tutuila.

The fono (meeting) of Atua's rulers takes place in Lufilufi on the great malae of Lalogafu'afu'a.

The two paramount matai titles of Ātua are the two Tama-a-aiga titles of Tupua Tamasese and Matā'afa, respectively belonging to the two main noble lineages of Ātua: Sā Fenunuivao (descendants of Salamasina through Fenunu’ivao, adoptive mother of Tupua) of Falefa and Salani; and Sā Levālasi (descendants of Levalasi, adoptive mother of Salamasina) of Amaile and Lotofaga.

Located on the eastern third of Upolu, the geography of Atua comprises the mountainous interior separating the northern and southern coasts, the long sandy beaches of the southern coast from Aleipata to Poutasi, and the rocky coastline of Anoama'a in the north.

The island of Tutuila is a traditional exclave of Atua and is its easternmost point located in what is now American Samoa.

The Fale Atua comprises the six orators of Lufilufi as well as the respective rulers of Falefā, Solosolo, Lalomanu, Lotofaga, Luatuanu'u.

According to legend, Tagaloa-a-lagi (Samoa's supreme god), entered Upolu, Savai'i and Tonga from Manu'a island on the eastern tip of the Samoan archipelago.

[1] From the first Tui Atua to Queen Salamasina and then from her to her descendants, the title has passed down along these lineages according to the prevalent power of the time.