Katharine (Kat) Holmes (born July 15, 1993) is an American fencer.

[1] She was a world champion in the women’s epee team event (Wuxi, China 2018), which was the first World Championship medal won by an American women’s epee team.

She also anchored the United States women’s epee team to its first World Cup gold medal (Dubai 2018), defeating Russia in overtime in the finals.

She was the back-to-back gold medalist in both the individual and team events at the Pan American Games in Lima in 2019 and Toronto in 2015.

[2] Holmes fenced for Princeton University from 2011-2014, took two years off to train, qualify and compete in the 2016 Olympic Games in Rio, then returned to Princeton in 2016, graduating in 2017 magna cum laude with departmental honors.