The 2023 NCAA Division III men's basketball tournament was a single-elimination tournament to determine the national champion of men's NCAA Division III college basketball in the United States. Featuring sixty-four teams, it was played in March 2023, following the 2022–23 season, concluding with the championship game on March 18, 2023.

The national semifinal and championship rounds were held at the Allen County War Memorial Coliseum in Fort Wayne, Indiana. Christopher Newport won their first national championship, beating Mount Union 74–72 on a buzzer-beating layup by Trey Barber.

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Wheaton

West Hartford

Belton

Newport News

Middlebury

Galloway

Keene

Swarthmore

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Oshkosh

Glassboro

Baltimore

Cleveland

Oswego

Ashland

  

2023 first and second round host sites

First and second rounds

First and second round games were played at campus sites on March 3 and March 4.

On the basis of team strength and geography, these locations were chosen to host first and second round games in the 2023 tournament:

• Crenshaw Gymnasium, Ashland, Virginia (Host: Randolph–Macon College)
• Max Ziel Gymnasium, Oswego, New York (Host: State University of New York at Oswego)
• Horsburgh Gymnasium, Cleveland, Ohio (Host: Case Western Reserve University)
• Goldfarb Gymnasium, Baltimore, Maryland (Host: Johns Hopkins University)
• Esbjornson Gymnasium, Glassboro, New Jersey (Host: Rowan University)
• Kolf Sports Center, Oshkosh, Wisconsin (Host: University of Wisconsin–Oshkosh)
• McPherson Academic and Athletic Complex, Alliance, Ohio (Host: University of Mount Union)
• Washington University Field House, St. Louis, Missouri (Host: Washington University in St. Louis)
• Tarble Pavilion, Swarthmore, Pennsylvania (Host: Swarthmore College)
• Spaulding Gymnasium, Keene, New Hampshire (Host: Keene State College)
• Stockton University Sports Center, Galloway Township, New Jersey (Host: Stockton University)
• Pepin Gymnasium, Middlebury, Vermont (Host: Middlebury College)
• Freeman Center, Newport News, Virginia (Host: Christopher Newport University)
• Mayborn Campus Center, Belton, Texas (Host: University of Mary Hardin–Baylor)
• O'Connell Athletic Center, West Hartford, Connecticut (Host: University of Saint Joseph)
• Chrouser Sports Complex, Wheaton, Illinois (Host: Wheaton College)

Third and fourth rounds

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2023 third and fourth round (blue) and Final Four (red) host sites

Third and fourth round games were played at campus sites on March 10 and March 11.

At the conclusion of the second round, the NCAA announced the following locations would host third and fourth round games.

• Crenshaw Gymnasium, Ashland, Virginia (Host: Randolph–Macon College)
• McPherson Academic and Athletic Complex, Alliance, Ohio (Host: University of Mount Union)
• Tarble Pavilion, Swarthmore, Pennsylvania (Host: Swarthmore College)
• Freeman Center, Newport News, Virginia (Host: Christopher Newport University)

National Semifinals and Championship

The National Semifinals and Championship were played on March 16 and March 18.

• Allen County War Memorial Coliseum, Fort Wayne, Indiana (Host: Manchester University)

Fort Wayne hosted the Final Four for the third time, having previously hosted in 2019 and 2022. Fort Wayne was also scheduled to host the Final Four in 2020 and 2021, before those editions of the tournament were canceled due to COVID-19 concerns.

A total of sixty-four bids were available for the tournament: 44 automatic bids—awarded to the champions of the forty-three NCAA-recognized Division III conference tournaments—and 20 at-large bids.

While this was the first season for the newly established Collegiate Conference of the South, its conference tournament champion was not eligible for an automatic bid until the 2025 tournament.^[1]

This was also the final year that the Colonial States Athletic Conference and New England Collegiate Conference received bids; the members of the CSAC merged into the United East Conference ahead of the 2023–24 season, consolidating its bid into the UEC's as part of the process.^[2] Meanwhile, after steady losses of membership in recent years, the four remaining members of the NECC joined other conferences for 2023–24 and beyond.

* – Denotes overtime period

• The R64, R32, S16, E8, F4, CG, and NC columns indicate how many teams from each conference were in the round of 64 (first round), round of 32 (second round), Sweet 16, Elite Eight, Final Four, championship game, and national champion, respectively.
• The Allegheny Mountain, American Rivers, Atlantic East, CUNYAC, Colonial States, Heartland, Liberty, MAC Commonwealth, MAC Freedom, MASCAC, Midwest, Minnesota, NECC, NEWMAC, North Atlantic, North Coast, Northwest, Presidents', Skyline, SAA, SLIAC, Upper Midwest, and USA South each had one representative, eliminated in the Round of 64 with a record of 0–1.

• 2023 NCAA Division I men's basketball tournament
• 2023 NCAA Division II men's basketball tournament
• 2023 NAIA men's basketball tournament
• 2023 NCAA Division III women's basketball tournament