Olivia Weaver (née Fiechter; born 15 September 1995 in New York) is an American professional squash player. As of 20 May 2024, she was ranked number 4 in the world.
Weaver played at the junior level for Team USA as a teenager, representing them at the 2012, 2013, and 2014 junior world championships, with her highest finish being a place in the round of 16 in 2014 in Windhoek, Namibia.
From 2014 to 2018, Weaver played at Princeton University, occupying primarily the number 1 position throughout her career with the tigers.
She won the 2018 Rhode Island Open professional tournament, beating Egyptian Menna Nasser in the final.
In 2022, she was part of the United States team that reached the final of the 2022 Women's World Team Squash Championships. It was the first time that the United States had reached the final.
In 2024, Weaver won her first ever world medal, a bronze in Cairo, after losing out 3-2 in a tightly contested battle against 7-time Egyptian world champion Nour El Sherbini.