The 2009 Maryland Terrapins football team represented the University of Maryland during its 57th season in the Atlantic Coast Conference. The Terrapins played in the Atlantic Division of the conference, and competed against all five divisional opponents, two Coastal Division opponents on a rotational basis, and one permanent cross-divisional rival: Virginia. The rotating Coastal Division opponents were Virginia Tech and Duke. In 2009, Maryland played its second game of the home-to-home series against California, this year in Berkeley.

Don Brown is an American college football coach and former player. He is the head football coach at the University of Massachusetts Amherst (UMass), a position he held from 2004 to 2008 and resumed prior to the 2022 season. In between his two stints as UMass, Brown was the defensive coordinator at the University of Maryland, College Park, the University of Connecticut, Boston College, the University of Michigan, and the University of Arizona. He served as the head football coach at Plymouth State University from 1993 to 1995 and Northeastern University from 2000 to 2003. Brown was also the interim head baseball coach at Yale University in 1992, tallying a mark of 26–10.