Mary Lanihei Connolly (born 30 December 2005) is a competitive swimmer from Mauke, Cook Islands.

She studies biomedical science, and has joined a World Aquatics programme for the development of Oceanic swimmers.

Her family has a sporting background as her mother represented the Cook Islands in athletics, and her cousin Zac Payne was a men's 50 metre freestyle swimmer at the 2012 Summer Olympics in London.

[7] The Cook Islands sent just two athletes, Connolly and 800 metres runner Alex Beddoes, to the 2024 Summer Olympics in Paris.

[9] Beddoes had to withdraw from the Games due to injury, and Connolly was the sole flagbearer at the closing ceremony.