|1891 Yale Bulldogs football|
|Conference||Intercollegiate Football Association|
|1891 record||13–0 ( IFA)|
|Home stadium||Yale Field|
|1891 Eastern college football independents records|
|Washington & Jefferson||–||4||–||2||–||0|
|Western Univ. Penn.||–||2||–||6||–||0|
The 1891 Yale Bulldogs football team represented Yale University in the 1891 college football season. The team finished with a 13–0 record and a 488-0 season score. It was retroactively named as the national champion by the Billingsley Report, Helms Athletic Foundation, Houlgate System, National Championship Foundation, and Parke H. Davis. Yale's 1891 season was part of a 37-game winning streak that began with the final game of the 1890 season and stopped at the end of the 1893 season.
Five Yale players were selected by Caspar Whitney to the 1891 All-America college football team: halfback and team captain Lee McClung; ends Frank Hinkey and John A. Hartwell; tackle Wallace Winter; and guard Pudge Heffelfinger. Camp also selected the following Yale players to his second team: quarterback Frank Barbour; halfback Laurie Bliss; guard Samuel Morison; and center George Sanford.
|September 30||Wesleyan||W 28–0|
|October 3||at Crescent Athletic Club||W 26–0||3,000|||
|October 7||at Trinity (CT)||Hartford, CT||W 36–0|
|October 10||vs. Williams||W 46–0|||
|October 14||YMCA Training School||W 28–0||500|||
|October 24||at Orange Athletic Club||Orange, NJ||W 36–0|
|October 31||Lehigh||W 38–0|
|November 3||Crescent Athletic Club||W 70–0||5,600|||
|November 7||Wesleyan||W 76–0|
|November 11||Amherst||W 27–0|
|November 14||vs. Penn||W 48–0|
|November 21||vs. Harvard||W 10–0||20,000|||
|November 26||vs. Princeton||W 19–0||40,000|||
On October 14, 1891, Yale defeated the team from the YMCA Training School by a score of 28–0 before a crowd of 500 persons at Yale Field in New Haven, Connecticut. Yale alumnus Amos Alonzo Stagg was the coach of the YMCA team and also played at the halfback position. Pudge Heffelfinger scored three touchdowns, and Lee McClung kicked three goals after touchdown. Halfback and team captain Lee McClung suffered a broken thumb in the game.