The National Invitation Tournament (NIT) is a college basketball tournament played each spring, with its final rounds in New York City. The tournament pre-dates the NCAA tournament. Since the rise to prominence of the NCAA tournament, the post-season NIT has consisted of teams who failed to qualify for the NCAA event.

There are separate men's and women's tournaments. There is also a "Preseason NIT", typically held in November.

The NIT is administered by the Metropolitan Intercollegiate Basketball Association (MIBA), which is made up of five New York City schools, Fordham University, Manhattan College, New York University, St. John's University and Wagner College.

Men's post-season NIT champions

• 1938 Temple
• 1939 Long Island U.
• 1940 Colorado
• 1941 Long Island U.
• 1942 West Virginia
• 1943 St. John's (N.Y.)
• 1944 St. John's (N.Y.)
• 1945 DePaul
• 1946 Kentucky
• 1947 Utah
• 1948 St. Louis
• 1949 San Francisco
• 1950 C.C.N.Y.
• 1951 Brigham Young
• 1952 La Salle University
• 1953 Seton Hall
• 1954 Holy Cross
• 1955 Duquesne
• 1956 Louisville
• 1957 Bradley
• 1958 Xavier
• 1959 St. John's (N.Y.)
• 1960 Bradley
• 1961 Providence
• 1962 Dayton
• 1963 Providence
• 1964 Bradley
• 1965 St. John's (N.Y.)
• 1966 Brigham Young
• 1967 So. Illinois
• 1968 Dayton
• 1969 Temple
• 1970 Marquette
• 1971 North Carolina
• 1972 Maryland
• 1973 Virginia Tech
• 1974 Purdue
• 1975 Princeton
• 1976 Kentucky
• 1977 St. Bonaventure
• 1978 Texas
• 1979 Indiana
• 1980 Virginia
• 1981 Tulsa
• 1982 Bradley
• 1983 Fresno State
• 1984 Michigan
• 1985 UCLA
• 1986 Ohio State
• 1987 So. Mississippi
• 1988 Connecticut
• 1989 St. John's (N.Y.)
• 1990 Vanderbilt
• 1991 Stanford
• 1992 Virginia
• 1993 Minnesota
• 1994 Villanova
• 1995 Virginia Tech
• 1996 Nebraska
• 1997 Michigan
• 1998 Minnesota
• 1999 California
• 2000 Wake Forest
• 2001 Tulsa
• 2002 Memphis
• 2003 St. John's (N.Y.)
• 2004 Michigan
• 2005 South Carolina