400 meters at the NCAA Division I Indoor Track and Field Championships

This is a list of the NCAA Division I indoor champions in the 400 metres or its imperial equivalent 440 yards. The imperial distance was generally contested until 1983, while the metric distance has been held instead since 1984. The event was not held in 1986 and 1987. Hand timing was used until 1975 and in 1980, while during all other years since 1976 fully automatic timing was used. In 1986 and 1987, the $1/10$-mile track that the races were run on was 25 in per lap short, making the actual race distance less than 400 meters those years.

Men

 * Key:
 * y=yards
 * w=wind aided
 * A=Altitude assisted