IGA or IgA may refer to:

Businesses and organizationsEdit

In governmentEdit

In science and technologyEdit

  • Immunoglobulin A (IgA), an antibody playing a critical role in mucosal immunity
  • Intergranular attack, another term for intergranular corrosion (a form of corrosion where the boundaries of crystallites of the material are more susceptible to corrosion than their insides)

Other usesEdit

See alsoEdit