Ezra Seymour Gosney (November 6, 1855 – September 14, 1942) was an American philanthropist and eugenicist. In 1928 he founded the Human Betterment Foundation (HBF) in Pasadena, California, with the stated aim "to foster and aid constructive and educational forces for the protection and betterment of the human family in body, mind, character, and citizenship," primarily through the advocacy of compulsory sterilization of the mentally ill and mentally retarded.
Gosney was born in Kenton County, Kentucky in 1855, and received a degree in law from the Saint Louis University School of Law in 1880. He settled in Flagstaff, Arizona where he was involved in the establishment of a Wool Grower's Association. Around 1905 he relocated to Southern California, eager to escape the "wild west" environment still present in Arizona while raising two daughters. There he became an active participant in the Pasadena, California business community, especially in the acquisition of citrus and other agricultural crops. Around this time he also became active in the establishment of the first California council of the Boy Scouts of America. He also donated $12,500 to Polytechnic School in 1907 to found the school. By the 1920s he had built up a considerable fortune, owned one of the largest lemon groves in the state, and served as the director of numerous banks, trusts companies, and corporations.