Jason M. Fields (born January 29, 1974) is an American politician, and a former stockbroker, financial advisor and banker from Milwaukee, Wisconsin. He is a Democratic member of the Wisconsin State Assembly, representing the 11th Assembly District since 2017. Fields previously represented this district from 2005 to 2013. In 2012, Fields was defeated in his bid for re-election in the Democratic primary by Mandela Barnes. In 2016, Fields ran for his old Assembly seat, and was elected.