The 2004 Atlantic Coast Conference men's basketball tournament took place from March 11–14 in Greensboro, North Carolina, at the Greensboro Coliseum. The Maryland Terrapins won the tournament as the #6 seed, upsetting #3 seed Wake Forest, #2 seed NC State, and top seed Duke in succession on their way to the championship.
The 2004 Atlantic Coast Conference men's basketball tournament took place from March 11–14 in Greensboro, North Carolina, at the Greensboro Coliseum. The Maryland Terrapins won as the #6 seed by defeating the #3 seed Wake Forest, the #2 seed NC State, and the top seed Duke consecutively to secure the championship.