The Best Female Athlete ESPY Award, known alternatively as the Outstanding Female Athlete ESPY Award, has been presented annually at the ESPY Awards since 1993 to the female voted to be, irrespective of nationality or sport contested, the best athlete in a given calendar year. Between 1993 and 2004, the award voting panel comprised variously of fans; sportswriters and broadcasters, sports executives, and retired sportspersons, termed collectively experts; and ESPN personalities, but balloting thereafter has been exclusively by fans over the Internet from amongst choices selected by the ESPN Select Nominating Committee. Through the 2001 iteration of the ESPY Awards, ceremonies were conducted in February of each year to honor achievements over the previous calendar year; awards presented thereafter are conferred in June and reflect performance from the June previous.

Mariel Margaret "Mia" Hamm is an American former professional football player, two-time Olympic gold medalist and two-time FIFA Women's World Cup champion. Hailed as a football icon, she played as a forward for the United States national team from 1987 to 2004. Hamm was the face of the Women's United Soccer Association (WUSA), the first professional women's soccer league in the United States, where she played for the Washington Freedom from 2001 to 2003. She played college soccer for the North Carolina Tar Heels and helped the team win four NCAA Division I Women's Soccer Championship titles.