Booth Gardner (born August 21, 1936), an heir to the Weyerhaeuser fortune, was the 19th Governor of the U.S state of Washington (List of Governors of Washington) between 1985 and 1993. He also served as the ambassador of the GATT (General Agreement on Tariffs and Trade). He is a Democrat (United States Democratic Party). Before serving as governor, Gardner was Pierce County (Pierce County, Washington) Executive. His service was notable for advancing standards-based education and environmental protection.

His stepfather is Norton Clapp, one of the original owners of the Seattle Space Needle. In 1976, he owned the Tacoma Tides in its one year in the American Soccer League.

After his retirement, Gardner was diagnosed with Parkinsons Disease. In 2006 he unexpectedly announced his support for assisted suicide. In 2008 he filed and successfully spearheaded the campaign for Initiative 1000, Washingtons Death With Dignity Act, which was closely modeled on Oregons assisted dying law (Oregon Death with Dignity Act), and he remains involved in implementing the Act. Gardner has said that he supports going even further than the current Washington and Oregon laws, to eventually permit lethal prescriptions for people whose suffering is unbearable without the requirement that the sufferer have a terminal condition.

In 2009, The Last Campaign of Governor Booth Gardner, a short documentary film, was produced by Just Media and HBO, chronicling the Initiative 1000 campaign. The film was nominated for an Academy Award for Best Documentary Short.

Gardner has also come out in support of eliminating Washingtons WASL (Washington Assessment of Student Learning) test, a standardized test required to graduate high school.