Bill Foster, Representative for Illinois
- Born – October 1955 in Madison, Wisconsin
- Education – B.S., University of Wisconsin-Madison; M.S., Ph.D., physics, Harvard University
- Military Service – None
- Profession – Physicist
- Political Experience – None
- In office since – 2008
- Family – Divorced from Ann, 2 children; married to Aesook
- Religious Affiliation – Undisclosed
