Tuatagaloa Tofa Siaosi (died June 1981) was a Western Samoan politician.

He served as a member of the Legislative Assembly from 1967 until 1973 and was Minister of Finance between 1970 and 1973.

[1] He married the niece of Tupua Tamasese Lealofi IV and gained the titles Taneolevo, Tofa and Tuatagaloa.

[5][1] However, he lost his seat in the 1973 elections,[6] in which he ran in the Falealili constituency.

[2] He subsequently worked as an accountant for Peter Meredith firm.