This is a list of Nationalliga A seasons since the inception of the league. National League A (NLA) is a professional ice hockey league in Switzerland.

1930s

• 1937–38
• 1938–39

1940s

• 1940–41
• 1941–42
• 1942–43
• 1943–44
• 1944–45
• 1945–46
• 1946–47
• 1947–48
• 1948–49
• 1949–50

1950s

• 1950–51
• 1951–52
• 1952–53
• 1953–54
• 1954–55
• 1955–56
• 1956–57
• 1957–58
• 1958–59
• 1959–60

1960s

• 1960–61
• 1961–62
• 1962–63
• 1963–64
• 1964–65
• 1965–66
• 1966–67
• 1967–68
• 1968–69
• 1969–70

1970s

• 1970–71
• 1971–72
• 1972–73
• 1973–74
• 1974–75
• 1975–76
• 1976–77
• 1977–78
• 1978–79
• 1979–80

1980s

• 1980–81
• 1981–82
• 1982–83
• 1983–84
• 1984–85
• 1985–86
• 1986–87
• 1987–88
• 1988–89
• 1989–90

1990s

• 1990–91
• 1991–92
• 1992–93
• 1993–94
• 1994–95
• 1995–96
• 1996–97
• 1997–98
• 1998–99
• 1999–00

2000s

• 2000–01
• 2001–02
• 2002–03
• 2003–04
• 2004–05
• 2005–06
• 2006–07
• 2007–08
• 2008–09
• 2009–10
• 2010–11
• 2011–12
• 2012–13
• 2013–14
• 2014–15
• 2015–16
• 2016–17
• 2017–18
• 2018–19
• 2019–20
• 2020–21
• 2021–22
• 2022–23