The 2021 NAIA Division II men's basketball tournament was due to be the tournament held by the NAIA to determine the national champion of men's college basketball among its Division I members in the United States and Canada for the . Due to the unfolding COVID-19 pandemic, the tournament was cancelled by the NAIA before any games could be played. In turn, no champion was crowned. The tournament was due to be played at the Municipal Auditorium in Kansas City, Missouri.