IGA

IGA or IgA may refer to:

Businesses and organizations

IGA (supermarkets) (initially Independent Grocers Alliance), a name used by many independent supermarkets throughout the world
- IGA (Australian supermarket group), the local Australian variant of the international IGA
International Island Games Association, an organization that organizes the Island Games (a friendly competition between teams from several islands and other small territories)
International Grenfell Association, an organization providing health care, education, religious and other services to the fishermen and coastal communities in Newfoundland and Labrador
Interscope-Geffen-A&M, an American record label
Irish Games Association, a non-profit body which is dedicated to promoting gaming in Ireland
International Gay Association, the original name of the International Lesbian, Gay, Bisexual, Trans and Intersex Association

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)

Identity Governance and Administration, the organisational policies, processes and procedures controlling identity management
In-game advertising, the use of computer and video games as a medium in which to deliver advertising
International Gamers Award, an award for strategy board games and historical simulation games
Islamic Golden Age, a period in the history of the Muslim world
Koji Igarashi, a Japanese video game producer, nicknamed IGA