Michael Bloomberg was born to a Jewish family of Russian and Polish descent at St. Elizabeth's Hospital, in the Brighton neighborhood of Boston on February 14, 1942. His father, William Henry Bloomberg, born in Chelsea, Massachusetts on January 19, 1906, was the son of Alexander "Elick" Bloomberg, a Russian Jewish immigrant and a real estate agent. His mother, Charlotte Bloomberg (nee Rubens), born January 2, 1909 in New Jersey, was the daughter of a Russian immigrant and a New Jersey-born mother. She is now a centenarian and reportedly in very good health. The family lived in the Boston neighborhood of Allston until Bloomberg was two years old; they subsequently moved to Atherton Road, in Brookline, Massachusetts for the next two years, and finally settled in Medford, a Boston suburb, where Bloomberg lived until after he graduated from college. His younger sister, Marjorie Tiven, is Commissioner of the New York City Commission for the United Nations, Consular Corps and Protocol.
Bloomberg attended Johns Hopkins University, where he joined Phi Kappa Psi, and graduated in 1964 with a Bachelor of Science (B.S.) degree in electrical engineering. Later he received his MBA degree from Harvard Business School. On May 16, 2009 he received a Honorary Doctorate of Humane Letters from Fordham University.
Bloomberg married Yorkshire-born Susan Brown in 1975. Their marriage produced two daughters, Emma (b. ca. 1979) and Georgina (b. 1983), who were featured on Born Rich, a documentary film about the children of the extremely wealthy. Georgina was romantically linked in 2007 with Cian O'Connor, the Irish showjumper whose 2004 Olympic gold medal was withdrawn. Bloomberg divorced Brown and is currently romantically linked with former New York state banking superintendent Diana Taylor.