| Year: | 1998 |
| Conference: | ACC |
| Gender: | Men's |
| Teams: | 9 |
| Arena: | Greensboro, North Carolina |
| City: | Greensboro Coliseum |
| Champions: | North Carolina |
| Titlecount: | 15th |
| Coach: | Bill Guthridge |
| Coachcount: | 1st |
| Mvp: | Antawn Jamison |
| Mvpteam: | North Carolina |
The 1998 Atlantic Coast Conference men's basketball tournament took place from March 5 to 8 in Greensboro, North Carolina, at the Greensboro Coliseum. North Carolina won the tournament for the second year in a row, defeating Duke in the championship game.
From 1998 to 2000, the ACC Tournament adopted a format that in which the top-seeded team played the last-place team in the first round. The winner of this game received a bye into the semifinals. A second first-round game pitted the #7 seed versus the #8 seed. The winner of that game played the #2 seed in the quarterfinals.
Antawn Jamison of North Carolina was named tournament MVP.
AP rankings at time of tournament
| Player | School | |
|---|---|---|
| Antawn Jamison | North Carolina | |
| Trajan Langdon | Duke | |
| Terrell McIntyre | Clemson | |
| Roshown McLeod | Duke | |
| Shammond Williams | North Carolina |
| Player | School | |
|---|---|---|
| Chris Carrawell | Duke | |
| Vince Carter | North Carolina | |
| Ed Cota | North Carolina | |
| Rodney Elliott | Maryland | |
| Ademola Okulaja | North Carolina |