Bianca Elissa Sierra García (born 25 June 1992) is a professional footballer who plays as a centre-back for Liga MX Femenil club UANL.

[4] Sierra played forward, midfield, and centerback in high school from her freshman through junior years and with the Mustang Spirit, a girl's club team, in 2009.

She showed up at tryouts for the Washington Spirit, played in several pre-season games, and was signed to a contract for the 2014 season on 4 April 2014.

[11] In 2013 Sierra was selected to be a member of the Mexico women's national football team and played in friendly matches against Canada and the United States.

[12] In June 2016, Sierra announced publicly she was in a relationship with fellow Mexico women's national teammate Stephany Mayor.