The Atlantic Coast Conference voted to add Stanford, Cal, and SMU, pushing its membership to 18 universities.
These three teams will mark the conference's furthest western expansion, as the previous westernmost member was Notre Dame, which competes in the conference in all sports except football.
The schools moving to the ACC is part of a larger trend of college sports conference realignment.
Cal and Stanford will leave the Pac-12, which now has just two teams for the foreseeable future: Washington State and Oregon State.
Former Pac-12 teams Oregon, Washington, USC, and UCLA will join the Big Ten in 2024, while Colorado, Arizona, Arizona State, and Utah will join the Big 12 next year.
SMU will leave the American Athletic Conference to join the ACC.
The addition of the three schools to the conference is reported to add more than $70 million to the ACC's TV deal with ESPN.
The conference was founded in 1953, and founding members Duke, Clemson, North Carolina, NC State, Virginia, and Wake Forest remain in the conference 70 years later.
North Carolina has previously expressed its dissatisfaction with conference expansion, while Florida State, which joined in 1991, has spoken about its frustration with the conference's revenue sharing.
The new additions to the conference will receive reduced revenue sharing percentages during their first few seasons in the ACC.