The old-timer six (1936-68)

After National University, University of the Philippines, Manila, and University of Santo Tomas left the league Ateneo de Manila, Colegio de San Juan de Letran, De La Salle College, Jose Rizal College, Mapua Institute of Technology and San Beda College continued the league and the league's membership remained unchanged for several decades.

World War II interrupted the league's activities in, but the league resumed operations after the war in 1947.

First expansion (1969-78)

San Sebastian College was admitted in 1969, marking the first change in the league's membership since 1936.

First contraction (1978-84)

The Ateneo de Manila University left the league in 1978 due to the violence that had become rampant in the games. De La Salle University, on the other hand, left the league in 1981 after a violence-filled 1980 game against Letran. San Beda College left in 1984 to concentrate on intramural events.

Academic Year	Juniors	Seniors	Host school
1978-79	San Beda College	San Beda College	Jose Rizal College
1979-80	Colegio de San Juan de Letran	Colegio de San Juan de Letran	Mapua Institute of Technology
1980-81	No champion - Tournament aborted by the Basketball Association of the Philippines		San Beda College
1981-82	San Beda College	Mapua Institute of Technology	none
1982-83	San Beda College	Colegio de San Juan de Letran	Trinity College of Quezon City
1983-84	Colegio de San Juan de Letran	Colegio de San Juan de Letran	Colegio de San Juan de Letran

Second expansion (1984-95)

After the Ateneo de Manila, La Salle, and San Beda left, the NCAA opened its doors to new members. In 1984, Perpetual Help College of Rizal was accepted as a new member, while Trinity College of Quezon City became a full member on 1985. San Beda rejoined the league in 1986, the year Trinity was dropped from the league due to non-compliance of league requirements.[3]

Third expansion (1996-present)

In 1996, Philippine Christian University became the seventh member of the NCAA. Three years later, De La Salle-College of Saint Benilde was admitted as the eighth member. [1]

Notes

^[1] The Juniors tournament was suspended from 1961 to 1965 by the NCAA Board of Control when it was revealed when several schools fielded ineligible players.[1]

^[2] Seniors championships awarded on the 1963-64 and 1964-65 seasons were later ruled as unofficial by the NCAA.[1]

^[3] Colegio de San Juan de Letran returned the Juniors trophy after a player was found to be ineligible. [7]

Teams marked with an asterisk (*) have withdrawn from the NCAA.

^[4] Includes Midgets title.
^[5] Excludes the 2 Seniors championships won on Loose Conference seasons.