Diane Pappas is a Democratic member of the Illinois Senate. She was previously a member of the Illinois House of Representatives for the 45th district from 2019 to 2021. The 45th district, located in northern DuPage County, includes all or parts of Addison, Bartlett, Bloomingdale, Carol Stream, Hanover Park, Itasca, Medinah, Roselle, Wayne, West Chicago, and Wood Dale.