The Scotland international joined the club in July 2018 and was one of several United youth graduates to return when the Women's team was formed. Hanson has made 42 appearances in all competitions for the club, scoring eight goals in that time.
Kirsty Hanson said:
“It’s really exciting to sign a new deal and continue my development at Manchester United. It’s been a dream to come back to the club where it all started for me and I’m really enjoying my journey here. We have such a great group of hard working players who all want the best for each other and that inspires me every single day.