The San Diego State Aztecs men's basketball team is the college basketball program that represents San Diego State University, located in San Diego, California. The team currently competes in the Mountain West Conference (MW) and plays its home games at Viejas Arena. The Aztecs began play in 1921 and have been to fifteen NCAA Division I tournaments and six NIT tournaments since joining NCAA Division I in 1969, the best finish coming recently in the 2023 NCAA Division I men's basketball tournament. The team previously reached three NCAA Division II tournaments and six NAIA tournaments, winning the latter in 1941. Since joining the Mountain West Conference, the Aztecs have won seven tournament championships and nine regular season titles. Former players who went on to achieve notable success in the NBA include Michael Cage and Kawhi Leonard. Other former players have gone on to achieve their most notable successes in other areas, such as Art Linkletter and Tony Gwynn.
 The Aztecs first began play during the 1921–22 basketball season. The team played that season, as well as the next three, as part of the Southern California Junior College Conference due to proximity to other schools, despite the fact that that SDSU (then known as San Diego Normal School) was not a junior college itself. The Aztecs joined the Southern California Intercollegiate Athletic Conference (SCIAC) in 1926 following a season as an independent, and competed in the NAIA until 1956, when they transitioned to the newly-founded NCAA Division II. They competed in six NAIA Men's Basketball Championships. Finishing as runners up in 1939 and in 1940, the Aztecs finally prevailed and won the 1941 NAIA Division I men's basketball tournament. After competing in NCAA Division II from 1956 until 1969 they became an NCAA Division I school in the fall of 1969. The Aztecs moved from the Pacific Coast Athletic Association (PCAA), which is now known as the Big West Conference, to the Western Athletic Conference (WAC) in 1978. In 1999, the Aztecs left the WAC and became a charter member of the Mountain West Conference. Prior to entering the Mountain West, the team had been to three NCAA Division I men's basketball tournaments. During their time in the MWC, the Aztecs have won several conference championships and have been to nine NCAA tournaments and four NIT tournaments.  In the 2010–11 season, the Aztecs were ranked as high as 4th in the nation and won their first ever games in the NCAA tournament, reaching the Sweet Sixteen. Following the 2013–14 season, the team reached its second Sweet Sixteen. In the 2019–20 season, the Aztecs finished with a 30–2 record for their best winning percentage in team history. The team spent seven straight weeks in the top 5 of both the AP Top 25 and Coaches Poll, finishing the season at #6 in both polls. The 2020 NCAA Division I men's basketball tournament was cancelled at the end of the season due to the COVID-19 pandemic. In the 2022-2023 season, the Aztecs reached their third Sweet Sixteen, first Elite Eight with a win over #1 Alabama, and first Final Four. The win over Creighton on March 26 in the South Region Final gave them their first Region championship in program history.  On April 1, they became the first team from the Mountain West Conference to reach the National Championship after defeating FAU 72-71 on a buzzer-beating shot by point guard Lamont Butler. In the 2023 NCAA Division I men's basketball championship game, the Aztecs were defeated by the University of Connecticut Huskies by a score of 59-76.
 The Aztecs have three major rivalries, the UNLV Rebels, the USD Toreros, and the BYU Cougars. Their primary rival is the UNLV Rebels, especially in recent years with some memorable showdowns. The USD Toreros are the Aztecs' crosstown rivals and play them near-annually in the City Championship. The Aztecs' rivalry with the BYU Cougars has been partially dormant since 2011, when the Cougars left the MWC for the WCC. The teams still play occasionally in non-conference games.
 The Aztecs play their home games at Viejas Arena (formerly Cox Arena), which is located on the west side of campus on the footprint of the former Aztec Bowl, where SDSU football played its home games from 1935 to 1966. Viejas Arena opened in 1997 as Cox Arena and seats 12,414 for basketball games. In 2009, the Viejas Band of Kumeyaay Indians purchased the naming rights for ten years. The arena features an octagonal scoreboard with video-replay system, that includes up-to-the-minute statistical information on individual players.  The facility is also equipped with seven locker rooms, two of which are complete with team rooms, equipment rooms, and a shared training room.
 Prior to the opening of the arena, men's basketball played its home games primarily at Peterson Gymnasium (located across the street from Viejas Arena and the current home to the Aztec women's volleyball team), and, for more than 30 years, played on-and-off at the San Diego Sports Arena.
 In 2015, the San Diego State Athletics Department opened an on-campus state-of-the-art practice facility, The Jeff Jacobs JAM Center, for the Aztec men's basketball and women's basketball teams.
 As of the 2022 Media Guide
 The Aztecs have appeared in the NCAA Division I tournament 15 times, with a combined record of 11–15.  They have reached the Sweet Sixteen three times, in 2011, 2014, and 2023; in the latter year they reached the Elite Eight, the Final Four, and the National Championship, all for the first time. Additionally, at 30–2 and ranked in the Top 10 they were considered a virtual lock for the 2020 NCAA Tournament, which was canceled due to the coronavirus pandemic.
 The NCAA began seeding the tournament with the 1978 edition with the present seeding format beginning the following year.
 The Aztecs have appeared in the National Invitation Tournament (NIT) six times, with a combined record of 8–6.
 The Aztecs appeared in the NCAA Division II tournament three times, with a combined record of 5–3.
 The Aztecs have appeared in the NAIA tournament five times. Their combined record is 15–4. They were NAIA national champions in 1941.
 On January 16, 2020, the Aztecs announced that they would be retiring former small forward Kawhi Leonard's number 15 jersey on February 1, 2020. Following Leonard's jersey retirement, some confusion circulated regarding statements that Leonard was the first player in Aztecs history to have his jersey retired, as the school ceremoniously retired former power forward and center Michael Cage's number 44 jersey in 1984. As of 2023, Leonard's jersey is the only one that has been hung in the rafters of Viejas Arena.
 *disputed
 Official record (including any NCAA imposed vacates and forfeits) against all current MWC opponents as of the completion of the 2022–2023 season:
 
[circular reference]

 As of the 2022-23 Media Guide 
 (*) Lead conference
 Several former Aztec men's basketball players have gone on to play in the NBA, play in other professional basketball leagues, or achieve significant notability outside of basketball.