First, what is FBS?
The Football Bowl Subdivision, usually called FBS, is the highest level of NCAA Division I college football. Within FBS, schools are grouped into conferences.
The conferences have their own schedules, championship races, rivalries and histories. Once you understand the conferences, the sport becomes much easier to follow.
Big Ten
For Southern California fans, this is probably the conference that changed the most locally because USC and UCLA are both Big Ten programs now.
That puts the two Los Angeles schools in the same conference as programs such as Ohio State, Michigan, Penn State, Oregon, Washington, Iowa and Wisconsin. The Big Ten is known for huge stadiums, long established rivalries and several of the most recognizable brands in college football.
SEC
The SEC is the Southeastern Conference. It includes programs such as Alabama, Georgia, LSU, Texas, Oklahoma, Tennessee and Florida.
The conference is closely associated with national championship expectations, NFL talent and enormous football culture throughout the South. Texas and Oklahoma joining the SEC made an already deep league even bigger.
ACC
The Atlantic Coast Conference includes traditional programs such as Clemson, Florida State and Miami, while Stanford and Cal are also part of the conference now.
That means a league once identified almost entirely with the East Coast now reaches all the way to California. The ACC champion receives an automatic place in the College Football Playoff under the current format.
Big 12
The Big 12 also changed dramatically through realignment. Programs such as Arizona, Arizona State, Colorado, BYU and Utah became part of the modern Big 12 after the old Pac 12 structure changed.
The conference also includes schools such as Texas Tech, Oklahoma State, Kansas State, Baylor and TCU. The Big 12 can feel especially wide open because several programs may realistically compete for the conference championship in the same season.
Pac 12
The Pac 12 returned in a new form for 2026. Oregon State and Washington State were joined by Boise State, Colorado State, Fresno State, San Diego State, Texas State and Utah State as football members.
It is not the old Pac 12 that included USC, UCLA, Oregon, Washington, Stanford and Cal, but it gives western college football another regional conference identity.
What about the other FBS conferences?
The American, Conference USA, Mid American Conference, Mountain West and Sun Belt also play FBS football.
These conferences may receive less national attention than the Big Ten, SEC, ACC and Big 12, but they still matter in the playoff structure. The highest ranked team from the American, Conference USA, MAC, Mountain West, Pac 12 or Sun Belt receives an automatic playoff bid.
So where do USC and UCLA fit now?
Both are Big Ten programs. That is still strange for people who grew up watching the old Pac 10 or Pac 12.
A USC or UCLA conference schedule can now include schools from the Midwest and East Coast. The geography may look unusual, but modern college football realignment has made the sport much more national.
How does the College Football Playoff work?
The 2026 season uses a 12 team playoff. The champions of the ACC, Big Ten, Big 12 and SEC receive automatic bids. The highest ranked team from the American, Conference USA, MAC, Mountain West, Pac 12 or Sun Belt also receives an automatic bid.
The remaining spots are awarded through the final College Football Playoff rankings. First round games are played on campus, then the quarterfinals and semifinals move into the bowl system.
Why do the conferences matter so much?
Conference membership affects a team's schedule, championship race, recruiting, television exposure, travel, rivalries and route into the playoff.
College football is not one league with identical divisions. It is a collection of conferences that eventually collide in the postseason. Once you understand that, Saturdays become much easier to follow.