Roger Marquardt (October 23, 1936 – May 16, 2012) was an American lobbyist and politician who served as a Republican member of the Illinois House of Representatives. Marquardt was born October 23, 1936 in Lombard, Illinois. He began his career as a police officer with Lombard rising to the rank of Deputy Chief before switching careers and opening a Century 21 location in DuPage. He was involved in professional issues and became a lobbyist for the Illinois Realtors