The 21st District includes all or part of the communities of Bloomingdale, Carol Stream, Lisle, Naperville, Warrenville, West Chicago, Winfield and Wheaton in DuPage and Will counties.
You can view a larger map of the 21st District by clicking here.
1725 S. Naperville Road,
Wheaton, IL 60189
M103D State House
Springfield, IL 62706
The Illinois State Board of Elections has more more information about state legislative and federal Congressional boundaries.