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 * Indian Gaming Association, a nonprofit organization for Native American gaming interests founded in 1986 * 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

In government

Illinois General Assembly The Illinois General Assembly is the legislature of the U.S. state of Illinois. It has two chambers, the Illinois House of Representatives and the Illinois Senate. The General Assembly was created by the first state constitution adopted in ...

* Indiana General Assembly * Iowa General Assembly

In science and technology

* 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 uses

* 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 The Islamic Golden Age was a period of scientific, economic, and cultural flourishing in the history of Islam, traditionally dated from the 8th century to the 13th century. This period is traditionally understood to have begun during the reign o ...

, a period in the history of the Muslim world * Koji Igarashi, a Japanese video game producer, nicknamed IGA

Businesses and organizations

In government

In science and technology

Other uses

See also