William Thomas Sali (born February 17, 1954) is a former American politician and former congressman from Idaho.
A Republican, he served a single term in the United States House of Representatives, representing Idaho's 1st congressional district, from 2007 to 2009.
Sali previously served in the Idaho Legislature as a member of the House.
Sali was elected to an open seat in Congress in 2006.
He was defeated for reelection in 2008 by Democrat Walt Minnick.
Sali was the first Idaho congressman to fail to win a second term in 56 years, since Republican John Travers Wood was defeated in 1952.
Minnick also served only one term before being defeated by Raúl Labrador in 2010.