Association may refer to:

• Voluntary association, a group of individuals who voluntarily enter into an agreement to accomplish a purpose
• 501(c) non-profit organization
• Association (statistics), comes from two variables that are related
• Association (psychology), something linked in memory or imagination with a thing or person
• The Association, a pop band
• Archaeological association, in archaeology, the relationship between objects found together
• HMS Association, a Royal Navy ship which sank in 1707
• Association (object-oriented programming), in object-oriented programming, a relationship between classes
• Association (ecology), a set of organisms which appear together and cover areas in a roughly uniform way
• Association (astronomy), combined or co-added group of astronomical exposures
• Professional body
• L'Association, a French comic book publisher