National Association may refer to:
Politics
- National Association (South Korea), a political party 1946–1960
- Kokumin Kyōkai ('National Association'), a Japanese political party 1892–1899
United States baseball
- National Association of Base Ball Players (1857–1870), the first organization governing American baseball
- National Association of Professional Base Ball Players (1871–1875)
- National Association (1879–1880)
- National Association of Professional Baseball Leagues, the former legal name of Minor League Baseball
- National Association of Professional Baseball, future name of Frontier League starting in 2027
Other uses
- National Association, or "N.A.", the official designation of federally chartered banks in the United States
See also
- American Association (disambiguation)