William Patrick Wynn (born September 10, 1961) is an American businessman and politician who served as the mayor of Austin, Texas, from 2003 to 2009.

Will's great-uncle, Ridley Ott, built and managed the Checker Front General Store, now FreshPlus, at 43rd and Duval in Hyde Park during the 1930s and 1940s.

Wynn has over 20 years of experience in the commercial real estate industry, with projects large and small, including the $40 million redevelopment of the Frost Bank Plaza on Congress Avenue in Downtown Austin.

The front-runner from the start, Wynn garnered most of the endorsements and raised much more money than his two competitors, Council Member Danny Thomas,and Jennifer Gale.

As mayor, Wynn served as chairman of the board of directors for Austin Energy, the ninth-largest public power utility in the United States.

Will was named Austinite of the Year by Austin Under Forty; was awarded Scenic Austin's first annual Scenic Hero Award, was named Energy Executive of the Year by the Association of Energy Engineers, and is a distinguished alumnus of Texas A & M's College of Architecture.

Mayor Wynn voted in favor of a Capital Area Metropolitan Planning Organization (CAMPO) toll road plan on July 12, 2004, prompting the Texas People for Efficient Transportation PAC to start a movement seek a recall election of the mayor.