"College level" is defined as a four-year college or university program in either the National Association of Intercollegiate Athletics or the National Collegiate Athletic Association.
If the team competed at a time before the official organization of either of the two groups but is generally accepted as a "college football program" it would also be included.
The list includes coaches with 30 seasons regardless of division.
Coaches expected to be active in the (fall) 2021 season are in bold.
Current through the end of the 2020–21 college football season.