Lucy Reum (July 15, 1914 – July 18, 2005) was a delegate to the Sixth Illinois Constitutional Convention and a horse racing industry reformer. As a delegate, she is credited with advocating for separating the question of whether to abolish cumulative voting from the question of whether to approve the constitution as a whole, saving the 1970 Illinois Constitution from likely defeat.[1] In the horse racing industry she is credited with the adoption of a national fire code for horse racing facilities.
Reum was either the first woman, or among the first women, in a number of roles: one of the first 15 women to serve as delegates to any of Illinois' six constitutional conventions; one of the first three women to run for countywide office in Cook County; and the first woman to chair a state racing board.