The Marion G. Wells Foundation is an American nonprofit organization established in 2001 and headquartered in Windermere, Florida. The foundation operates as a tax-exempt public charity and promotes the values of small government, free enterprise, and a strong national defense. Founded by Florida socialite and philanthropist Marion G. Wells, the foundation initially received funding from Marion and her husband, Preston A. Wells Jr. As of the fiscal year 2023; the foundation reported approximately $3.17 million in liquid assets and an annual revenue of $1.5 million. Following Marion G. Wells's death in 2016, her son, John J. Flemm III, was elected president of the foundation. The Foundation has been a significant donor to several conservative organizations, notably the Heritage Foundation and the Conservative Partnership Institute.