Mary Duvall began serving in the SD House of Representatives in January 2013, representing central South Dakota. She currently serves as chair of the Transportation Committee and is a member of the Taxation Committee. She has served on multiple interim committees, dealing with highway infrastructure, education funding, agricultural land taxes, water development, and county government.
Mary has a background in agricultural research, policy, and communications. She is a certified fitness instructor, teaching a variety of classes at the local YMCA. She and her husband, Ron, are active in their church and community. They have two married daughters. Hobbies include travel, reading, bicycling, and kayaking.