At first, it is Ivy League and Big 10 teams that shared the title in the late 1800s until 1905s. They had more than 10 polls around the 1930s to 1950s. AP began in 1934, but was not recognized until 1936.
1905 the co-champs are Yale and Big 10's University of Chicago.
1908 was Harvard, LSU and Penn.
1910 was Harvard and Pittsburgh.
1913 have Auburn, University of Chicago and Harvard.
1914 Army, Texas and Illinois
1919 Centre College, Harvard, Illinois, Notre Dame and Texas A&M
1921 Lafayette, California, Cornell, Iowa, Washington and Jefferson and Vanderbilt
1926 Lafayette, Navy, Alabama, Michigan and Stanford
1928 Detroit (now known as Detroit-Mercy), Georgia Tech, USC
1932 Colgate, Michigan, USC
1935 SMU, TCU, LSU, Minnesota, Princeton
1944 Army, Ohio State
1945 Army, alabama, Ohio State
1946 Army, Georgia, Notre Dame
2008 Florida, Utah
2010 Alabama, TCU
2011 Alabama, LSU, Oklahoma State
2016 Alabama, Clemson
Yes, there are other polls besides the AP, Coaches and CPF polls that crowned other schools as National Champs. One of these old polls that are not considered used by the media, but have been used in the past have voted schools as co-champs in recent years. I think oklahoma State got the crown as a protest against the BCS for putting Alabama in the National title after they lost to LSU.
Total championships won.
School Championships
Princeton 28
Yale 27
Notre Dame 22
Alabama 20
Oklahoma 17
USC 17
Michigan 16
Ohio State 16
Harvard 12
Nebraska 11
Pittsburgh 11
Miami (FL) 9
Minnesota 9
Texas 9
Florida State 8
LSU 8
Georgia Tech 7
Penn State 7
Tennessee 7
Georgia 6
Michigan State 6
Penn 6
Iowa 5
Army 5
Auburn 5
California 5
Cornell 5
Florida 5
Illinois 5
Washington 4
Lafayette 3
Ole Miss 3
SMU 3
TCU 3
Texas A&M 3
Arizona State 2
Arkansas 2
Chicago 2
Clemson 2
Maryland 2
Missouri 2
Oklahoma State 2
Stanford 2
BYU 1
Centre 1
Colgate 1
Colorado 1
Columbia 1
Dartmouth 1
Detroit 1
Kentucky 1
Navy 1
Purdue 1
Rutgers 1
Syracuse 1
UCLA 1
Utah 1
Washington & Jefferson 1
Wisconsin 1
http://collegepollarchive.com/football/a...krNUmhKvn2
The link above shows the number of times a school was ranked in the AP poll since 1936. You do noticed schools that dropped football, moved to D2, D3 and NAIA. Some are military teams during the war.
http://collegepollarchive.com/football/a...krN1WhKvn3
The next shows a list of teams that made the AP to 25, and teams that have not made the AP polls. They also listed schools at the lower levels as well.
University of Arkansas-Monticello made the AP poll 1 time back in 1943. They were in the NAIA in the Arkansas Conference at the time.
Some schools listed happened to be part of some of the major conferences at the time they appeared in the Top 20 AP poll.
Sewanee and Washington and Lee in the southern Conference. Sewanee was a founding member of the SEC.
Colorado College was in the RMAC with the likes of Colorado and Colorado State.
George Washington was a member for football in the Southern Conference.
hardin-Simmons was in the Border Conference when they were ranked.
Southwestern Texas used to be a member of the SWC.
Most of the schools were mostly Independent from conferences.
http://www.collegefootballfaniacs.com/De...ectors.xsp
This shows a list of all polls on football. Several of them are still running which is why you get Clemson and Alabama as co-champs. Now, UCF seemed to be crowned already as the champ this season.