Peter Gosselin Fitzgerald (born October 20, 1960) is a former United States Senator from Illinois.
A Republican, he served from 1999 until his retirement in 2005.
Fitzgerald defeated Democratic incumbent Carol Moseley Braun in 1998, becoming the first Republican to win a U.S.
Senate race in Illinois since Charles Percy twenty years earlier.
He had previously served in the Illinois State Senate from 1992 to 1998.
Known as a maverick for his willingness to break party lines, Fitzgerald retired from the Senate in 2005 and was succeeded by Barack Obama.
After retiring from politics, he and his wife moved to McLean, Virginia.
The son of millionaire banking magnate Gerald Francis Fitzgerald, Peter founded Chain Bridge Bank in 2007.