Prior to her election to the Maine Legislature, Warren served on the Hallowell City Council, including 5 years as mayor.
Warren was born and raised on a farm in Pittston, Maine. She was a first generation college student when she graduated from the University of Maine at Farmington in 1994 with a B.A. in psychology. She earned a M.S. in adult education from the University of Southern Maine and a M.S.W. in Organizational/Community Practice from the University of New England.