The 2018 Harvard Crimson football team represented Harvard University during the 2018 NCAA Division I FCS football season as a member of the Ivy League.

They were led by 25th-year head coach Tim Murphy and played their home games at Harvard Stadium.

They finished the season 6–4 overall and 4–3 in Ivy League play to place third.

The Crimson hosted Ivy League foes Princeton, Columbia, and Yale for the 135th edition of The Game, and traveled to Brown, Cornell, Dartmouth, and Penn.

Harvard's non-conference opponents were San Diego of the Pioneer Football League, Rhode Island of the Colonial Athletic Association, and Holy Cross of the Patriot League.