I think it's Georgia Southern
You need to be a lot more precise on this question:
Which division?
Do you want to count national championships going all the way back to the 1800s, when only a few colleges even had football teams, and no one played more than 2-3 games in a "season"?
Given that there is no NCAA-endorsed system for determining a "national champion" in Division I-FBS (formerly I-A) college football, which of the many non-NCAA selectors are you going to go with?
The AP poll is probably better than most, but it only goes back to the 1930s, so are you going to cut it off there?
Are you going to go with multiple selectors?
If so, what happens if a college is declared champion by two selectors in the same year? Do they get credit for TWO national championships, or just one? Doesn't seem fair, but on the other hand, shouldn't a team that was selected by BOTH polls get more credit than one that was selected by only ONE of the two polls (a "split" national championship)?
But then what about the years when there was only one selector? The case can be made that a team would have been selected by all selectors, and thus would have gotten 6-7 national championships in one year. But there was only 1 selector selecting that year.
The fact is, this is a very, very hairy question, and there are many, many different answers to it. You could help by being more specific, but really, no matter how you state the question, someone will say you should have stated it some other way, that makes THEIR favorite team the answer. Sorry, but that's the nature of the beast. The NCAA should have taken this over a hundred years ago, before the Bowls got their hooks into it. And now it's too late.
The NCAA does not have a national championship at the FBS level, and had none of any kind in 1911.
Multiple organizations have retroactively selected a national champion for 1911, and among those listed in the NCAA Records Book, 8-0-2 Princeton is a unanimous selection for the 1911 mythical national championship, with one group splitting the title between Princeton and 8-0-1 Penn State.
6-0-1 Minnesota and 11-1 Carlisle have also been ranked #1 for 1911 in computer rankings not listed in the NCAA Records Book, and one College Football researcher believes that they would have finished as the top two teams if there had been an AP poll in 1911.
The colleges that shared the national Championship football title in January 1933 are Princeton and Michigan. There was a lot happening in that time of frames.
Their are alot of them.
Florida Gators
Uni of So Cal
LSU Over Ohio state
Michigan Wolverines
Lousiana State University beat Ohio St. University for the National Championship.
Ohio State, Wisconsin, and Georgia all shared a piece of the championship in 1942, depending on which polls you looked at.
Yes ... Troy won the NAIA national championship in 1968 and the NCAA Division II national championship in 1984 and 1987.
The Florida Gators defeated the Florida State Seminoles 52-20 to win the 1996 NCAA National Championship.
Texas
Pittsburgh
maybe this will help ...http://www.secsportsfan.com/top-all-time-ncaa-college-football-national-championship-conference.html