2023 Diamond Head Classic

The 2023 Diamond Head Classic was a mid-season eight-team college basketball tournament that was played on December 21, 22, and 24 at the Stan Sheriff Center in Honolulu, Hawaii. It was the fourteenth annual Diamond Head Classic tournament, and was part of the 2023–24 NCAA Division I men's basketball season. The 2023 field was announced in May, and featured Georgia Tech, Hawaii, Nevada, Old Dominion, Portland, Temple, TCU and UMass.

Bracket
* – Denotes overtime period

Notes: All games played at the Stan Sheriff Center in Honolulu, Hawaii.