Tapuaeta cay is one of 22 islands in the Aitutaki atoll of the Cook Islands. It is a sand cay located on the eastern perimeter of Aitutaki Lagoon, to the west of Tapuaetai, and is 190m long and up to 70m wide.
- D. R. Stoddart (13 August 1975). "Reef Islands of Aitutaki". In D.R. Stoddard and P.E. Gibbs (ed.). Atoll Research Bulletin No 190, Almost-Atoll of Aitutaki, Reef Studies in the Cook Islands, South Pacific (PDF). Smithsonian Institution. p. 69. Archived from the original (PDF) on 2009-09-18. Retrieved 8 August 2020.