Tammi Musumeci (born July 8, 1994) is an American submission grappler and black belt Brazilian jiu-jitsu competitor.

[12] At the 2021 World Jiu-Jitsu Championship Musumeci won Silver after losing the Light-feather final by decision to Ana Rodrigues.

[14] As training partners, Tammi and her brother Michael "Mikey" Musumeci have won a combined 9 International Brazilian Jiu-Jitsu Federation World Championship titles in gi and no-gi competition.

[2][15] Outside of jiu-jitsu, Musumeci is an attorney, having graduated from the William S. Boyd School of Law at the University of Nevada, Las Vegas in 2020.

[20] Musumeci won a bronze medal in the under 55kg division of the ADCC North American West Coast Trials 2024 on March 31, 2024.