Ala'alatoa is a surname. Notable people with the surname include:
Allan Alaalatoa (born 1994), Australian rugby union player Barbara Ala'alatoa, New Zealand Samoan school principal Harlan Ala'alatoa (born 1988), Australian rugby union player Michael Alaalatoa (born 1991), Australian rugby union player Vili Alaalatoa (born 1962), Samoan rugby union player