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
  • Professional association
  • Alumni association, an association of former students of a college or university
  • An industry trade group is also known as a trade association
  • Sports association

Associations in various fields of study:

• Association (statistics), comes from two variables that are related
• Association (psychology), something linked in memory or imagination with a thing or person
• Association of Ideas, philosophical und psychological term
• Archaeological association, in archaeology, the relationship between objects found together
• 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
• Genetic association
• Association (object-oriented programming), in object-oriented programming, a relationship between classes

Names of particular entities or things:

• The Association, a pop band
• HMS Association, a Royal Navy ship which sank in 1707
• L'Association, a French comic book publisher
• Continental Association, often called the "Association", an economic boycott during the American Revolution