Nemzeti Bajnokság I/A

The Nemzeti Bajnokság I/A (National Championship I/A, commonly abbreviated NB I/A) is the highest level league of club men's basketball in Hungary.

Format
The league comprises 14 teams. A NB I/A season is split into a league stage and a playoff/playout stage. At the end of the league stage (14 teams) the top 5 teams play another league stage, another 5 play with each other, and then the top 8 teams qualify for the playoff stage. The playoffs are played in "Best of five" format. The winning team of the final round are the champions of that season.

The two bottom teams play with each other in "Best of three" format. The losing team gets relegated.

Title holders
• 1933: Közgazdasági Egyetem

• 1934: BSZKRT Előre

• 1934–35: TFSE

• 1935–36: MAFC

• 1936–37: BSZKRT Előre (2)

• 1937–38: BSZKRT Előre (3)

• 1938–39: BSZKRT Előre (4)

• 1939–40: BSZKRT Előre (5)

• 1940–41: BSZKRT Előre (6)

• 1941–42: BEAC

• 1943: BSZKRT Előre (7)

• 1944: MAFC (2)

• 1945: BSZKRT Előre (8)

• 1945–46: Bp. Kinizsi TE

• 1946–47: Bp. Postás

• 1947–48: MÁVAG

• 1948–49: BSZKRT Előre (9)

• 1949–50: MAFC (3)

• 1950: MÁVAG

• 1951: MAFC (4)

• 1952: Budapesti Honvéd (1)

• 1953: Budapesti Honvéd (2)

• 1954: Budapesti Honvéd (3)

• 1955: Budapesti Honvéd (4)

• 1956: MAFC (5)

• 1957: Budapesti Honvéd (5)

• 1957–58: Budapesti Honvéd (6)

• 1958–59: Budapesti Honvéd (7)

• 1959–60: Budapesti Honvéd (8)

• 1960–61: Budapesti Honvéd (9)

• 1961–62: Budapesti Honvéd (10)

• 1962–63: Budapesti Honvéd (11)

• 1964: Budapesti Honvéd (12)

• 1965: Budapesti Honvéd (13)

• 1966: Budapesti Honvéd (14)

• 1967: Budapesti Honvéd (15)

• 1968: Budapesti Honvéd (16)

• 1969: Budapesti Honvéd (17)

• 1970: MAFC (6)

• 1971: Budapesti Honvéd (18)

• 1972: Csepel (1)

• 1973: Csepel (2)

• 1974: Budapesti Honvéd (19)

• 1975: MAFC (7)

• 1976: Budapesti Honvéd (20)

• 1977: Budapesti Honvéd (21)

• 1978: Budapesti Honvéd (22)

• 1979: Budapesti Honvéd (23)

• 1980–81: Budapesti Honvéd (24)

• 1981–82: Budapesti Honvéd (25)

• 1982–83: Budapesti Honvéd (26)

• 1983–84: Budapesti Honvéd (27)

• 1984–85: Budapesti Honvéd (28)

• 1985–86: Budapesti Honvéd (29)

• 1986–87: Körmend (1)

• 1987–88: Zalaegerszegi TE (1)

• 1988–89: Csepel (3)

• 1989–90: Zalaegerszegi TE (2)

• 1990–91: Szolnoki Olaj (1)

• 1991–92: Zalaegerszegi TE (3)

• 1992–93: Budapesti Honvéd (30)

• 1993–94: Budapesti Honvéd (31)

• 1994–95: Budapesti Honvéd (32)

• 1995–96: Körmend (2)

• 1996–97: Budapesti Honvéd (33)

• 1997–98: Alba Fehérvár (1)

• 1998–99: Alba Fehérvár (2)

• 1999–00: Alba Fehérvár (3)

• 2000–01: Kaposvár (1)

• 2001–02: Atomerőmű (1)

• 2002–03: Körmend (3)

• 2003–04: Kaposvár (2)

• 2004–05: Atomerőmű (2)

• 2005–06: Atomerőmű (3)

• 2006–07: Szolnoki Olaj (2)

• 2007–08: Falco Szombathely (1)

• 2008–09: Atomerőmű (4)

• 2009–10: Zalaegerszegi TE (4)

• 2010–11: Szolnoki Olaj (3)

• 2011–12: Szolnoki Olaj (4)

• 2012–13: Alba Fehérvár (4)

• 2013–14 : Szolnoki Olaj (5)

• 2014–15 : Szolnoki Olaj (6)

• 2015–16 : Szolnoki Olaj (7)

• 2016–17 : Alba Fehérvár (5)

• 2017–18 : Szolnoki Olaj (8)

• 2018–19 : Falco KC Szombathely (2)

• 2019–20 : Cancelled due to the COVID-19 pandemic

• 2020–21 : Falco KC Szombathely (3)

• 2021–22 : Falco KC Szombathely (4)

• 2022–23 : Falco KC Szombathely (5)

Format
As we can see from the chart the number of teams in the Hungarian First Division changed a lot and continuously. The league started in 1933 with ten teams and with the formation of teams the league expanded continuously. Currently, there are 14 teams in the first division.