The 2020 Delaware Fightin' Blue Hens football team represented the University of Delaware as a member of the North Division of the Colonial Athletic Association (CAA) during the 2020–21 NCAA Division I FCS football season.

Led by fourth-year head coach Danny Rocco, the Fightin' Blue Hens compiled an overall record of 7–1 with a mark of 4–0 in conference play, winning the CAA and CAA North Division titles.

Delaware advanced to the NCAA Division I Football Championship playoffs, the Fightin' Blue Hens beat Sacred Heart in the first round and Jacksonville State in the quarterfinals before losing to eventual national runner-up, South Dakota State, in the semifinals.

On July 17, 2020, the CAA announced that it would not play fall sports due to the COVID-19 pandemic.

Delaware originally had a game scheduled against Delaware State (November 21), but it was canceled on July 16 due to the Mid-Eastern Athletic Conference (MEAC)'s decision to cancel fall sports due to the COVID-19 pandemic.