2020–21 Big 12 Conference men's basketball season

The 2020–21 Big 12 men's basketball season began with practices in October 2020, followed by the start of the 2020–21 NCAA Division I men's basketball season in November. Regular season conference play began in December 2020 and concluded in March 2020. The Big 12 Tournament is was held from March 11–14, 2021 and was played at the T-Mobile Center in Kansas City, Missouri. Baylor won their first ever National Championship, becoming the first Big 12 team to win the National Championship since Kansas in 2008.

2020–21 Big 12 Conference men's basketball season

The 2020–21 Big 12 men's basketball season began with practices in October 2020, followed by the start of the 2020–21 NCAA Division I men's basketball season in November. Regular season conference play began in December 2020 and concluded in March 2020. The Big 12 Tournament is was held from March 11–14, 2021 and was played at the T-Mobile Center in Kansas City, Missouri. Baylor won their first ever National Championship, becoming the first Big 12 team to win the National Championship since Kansas in 2008.