Martha Harris (born 19 August 1994) is an English footballer who plays as a full-back.
Harris has represented England at under-19, under-20 and under-23 level and was named the inaugural PFA Women's Young Player of the Year in 2014. On 13 July 2018, it was announced that Harris was joining Manchester United for their inaugural season. On 9 September, she made her debut for the club in a 12–0 away victory over Aston Villa in the Championship.