The 1984 NCAA Division I-AA football season, part of college football in the United States organized by the National Collegiate Athletic Association at the Division I-AA level, began in August 1984, and concluded with the 1984 NCAA Division I-AA Football Championship Game on December 15, 1984, at Johnson Hagood Stadium in Charleston, South Carolina.

The Montana State Bobcats won their first I-AA championship, defeating the Louisiana Tech Bulldogs by a score of 19−6.

[1] Big Sky Conference – Montana State Gulf Star Conference – Nicholls State and Northwestern State Ivy League – Penn Mid-Continent Conference – Eastern Illinois and Northern Iowa Mid-Eastern Athletic Conference – Bethune-Cookman Ohio Valley Conference – Eastern Kentucky Southern Conference – Chattanooga Southland Conference – Louisiana Tech Southwestern Athletic Conference – Alcorn State Yankee Conference – Boston University and Rhode Island The top four teams were seeded, and received first-round byes.

[5] Undefeated Tennessee State was disqualified from the postseason due to the use of ineligible players.

[6] *indicates overtime period