The England Under-21 international joined United when the women's team was formed in July 2018, and has made 47 appearances in all competitions for the club, scoring 22 goals.
Ella Toone said:
“I’m thrilled to have signed a new deal. I think of the club as family and I’m so happy to be continuing my development here.“I want to thank the players and staff for the environment we have created at United; I wouldn’t want to be playing my football anywhere else.
“I’m just looking forward to getting started next season - we’ve been working really hard during these uncertain times and I know we’ll be back stronger.