The Boston Celtics is an American professional basketball team based in Boston, Massachusetts. The team participates in the American Professional Basketball League as the Atlantic Division of the Eastern Conference.

In 1946, the Celtics and the Basketball Association of America (BAA) were formed together. By the fall of 1949, BAA and NBL merged, and the Celtics became one of the NBA teams. In 1950, the Celtics became the first team to sign a black African-American player Chuck Cooper through the draft.

League: Eastern League

Division: Atlantic Division

Founded: 1946

History: Boston Celtics 1946-present

Arena: TD Garden

City: Boston, Massachusetts

Team color: green, gold, brown, black, white 　 　 　

Chairman: Rich Gotham

Head coach: Brad Stevens

Owner: Boston Basketball Cooperative

Overall champion: 17 (1957, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1968, 1969, 1974, 1976, 1981, 1984, 1986, 2008)

League Championship: 21 times (1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1968, 1969, 1974, 1976, 1981, 1984, 1985, 1986, 1987, 2008, 2010)

Division champions: 31 times (1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1972, 1973, 1974, 1975, 1976, 1980, 1981, 1982, 1984, 1985, 1986, 1987, 1988, 1991, 1992, 2005, 2008, 2009, 2010, 2011, 2012, 2017)