IGG, IgG or igg may refer to:

• IGG Inc., a Chinese video game company

• IGG Software, US company

• Igiugig Airport, IATA code IGG

• Immunoglobulin G, IgG, a type of antibody

• Inert gas generator, tanker machinery

• Investigative genetic genealogy or forensic genetic genealogy

See also

• IG (disambiguation)