National Association can refer to:

• National Association, or "N.A.", the official designation of federally-chartered banks in the United States.
• National Association of Base Ball Players, the governing body of early high-level but officially non-professional baseball in the United States.
• National Association of Professional Base Ball Players, regarded by baseball historians as the first professional baseball league. This league split from the National Association of Base Ball Players in 1871 and was replaced after 1875 by the National League.
• National Association of Professional Baseball Leagues, the former name of the governing body of Minor League Baseball.

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