is an American professional soccer player for Première Ligue club Paris Saint-Germain and the United States national team. A versatile player, she primarily plays as an attacking midfielder or forward at club level and as a left back for country.

Dunn played collegiate soccer with the North Carolina Tar Heels from 2010 to 2013 and was awarded the 2012 Hermann Trophy for best college soccer player. She was a member of the team that won the 2012 FIFA U-20 Women's World Cup in Japan. Following her collegiate career, Dunn was selected first overall by the Washington Spirit in the 2014 NWSL College Draft. The following year, she won the NWSL Most Valuable Player and the Golden Boot awards, becoming the youngest player to win both awards, at age 23.

Dunn first appeared for her country during an international friendly against Scotland on February 13, 2013. She has since made more than 100 total appearances for the team. She was part of the team that won the 2019 FIFA Women's World Cup, bronze at the 2020 Tokyo Olympics, and gold at the 2024 Paris Olympics.