Jason M. Fields (born January 29, 1974) is an American politician, and a former stockbroker, financial advisor, and banker from Milwaukee, Wisconsin.

He returned to school as an adult, earning his Bachelor's degree in Business Management from Milwaukee's Cardinal Stritch University in 2014.

[7] In 2012, he lost his bid for reelection in the Democratic primary, losing to Mandela Barnes, son of a public school teacher, who had made major issues of Fields's support for the school voucher program, and Fields’s opposition to limiting interest rates charged by payday loan companies whose charges can exceed a 500% annual percentage rate.

[8][9] In 2016, Barnes announced he would challenge incumbent Lena Taylor in a Democratic primary for her seat in the Wisconsin State Senate.

He defeated Milwaukee community organizer Darrol D. Gibson in the Democratic primary and was unopposed in the general election.