is an American retired soccer player and former member of the United States women's national soccer team, playing the defensive midfielder position. She last played club soccer for the Chicago Red Stars in the American National Women's Soccer League. She won gold medals with the United States at the 2004 Athens Olympics, 2008 Beijing Olympics, and 2012 London Olympics. She has also finished third place or better with the US at the 2003, 2007, 2011 and 2015 FIFA Women's World Cups. She was a finalist for the 2005 FIFA World Player of the Year award, and won an NCAA Women's Soccer Championship with Notre Dame in 1995. Shannon Boxx announced her retirement from international and club soccer after winning the 2015 FIFA Women's World Cup. She played her last game on October 21, 2015, when the USWNT tied with Brazil as part of their victory tour.

Boxx is the younger sister of Gillian Boxx, who won a gold medal at the 1996 Olympics with the United States softball team.

Boxx was diagnosed with lupus in 2007 when she was 30 years old, and went public with her diagnosis shortly before the 2012 London Olympics at which she won gold with the United States team.

In 2020, Boxx joined the ownership group of Angel City FC of the National Women's Soccer League.

In 2022, Boxx was inducted into the National Soccer Hall of Fame.