William Joseph "Bill" Bogaard (born 1938 in Sioux City, Iowa) is an American Democratic politician, and the current mayor of Pasadena, California, elected in 1999, and re-elected with an overwhelming majority of the vote (over 85%) in 2003. Bogaard is the first elected mayor of Pasadena since the 1940s, the longest serving mayor in Pasadena's history, and the only mayor to serve non-consecutive terms (Bogaard served a two-year term as mayor in the 1980s).

Prior to being elected mayor, Bogaard was a lawyer, and taught at the University of Michigan and the University of Southern California. He graduated from Loyola Marymount University and was a captain in the U.S. Air Force. He obtained his juris doctorate degree from the University of Michigan. His wife is Claire Bogaard, who moved with Bill to Pasadena in 1971, and they have four children.

In the 2006 election, Bogaard sought re-election for a third term as Mayor. His opponent was Aaron Proctor. The election was held on March 6, 2007.

Bogaard easily won the March 6, 2007 election against Proctor, getting 11,558 votes (88.7% of the vote).