The majority of the Village of Downers Grove is within the Illinois House of Representatives 81st Representative District, which was represented by Ron Sandack (Republican) as of 2015. Sandack abruptly resigned in July 2016 citing issues with social media and "ugly" politics. In August, local Republican officials chose David S. Olsen, previously the mayor pro tem of Downers Grove, as the new Representative of the 81st District. In 2018, newcomer Anne Stava-Murray overcame David S. Olsen in the election with only approximately $30,000. Portions of northern Downers Grove are within the Illinois House of Representatives 47th Representative District, which is represented by Deanne Mazzochi (Republican) and the Illinois House of Representatives 48th Representative District, which is represented by Terra Costa Howard (Democratic).