Iva can mean:
- Iva, the name of a tree which grows on mountains, and means strong (strong person).
- Iva, South Carolina, a town in the United States
- Iva, Samoa, a village
- Iva (film), a 1993 film by Izu Ojukwu
- Iva (plant), a plant genus in the family Asteraceae
- Iva (copepod), a former crustacean genus in the family Pontellidae; its only species is now Pontella magna
- Iva (given name)
- Iva (mythology), the underworld in Polynesian mythology
- 497 Iva, asteroid
- Hurricane Iva (disambiguation), various hurricanes
IVA can mean:
- Impuesto al valor agregado, value added tax in various Spanish-speaking countries
- Individual Voluntary Arrangement, in the United Kingdom
- Individual Vehicle Approval, a kind of Motor vehicle type approval
- Independent Voters Association, a North Dakota U.S. political organization formed in the 1920s
- Interaction value analysis, a mathematical model of organizational behavior
- Informationsvidenskabelige Akademi, a Danish University
- Intravenous Anesthesia
- IVA Communications satellite (see List of Intelsat satellites)
- IVA (Isovaleric acidemia) is an autosomal recessive metabolic disorder
- The Royal Swedish Academy of Engineering Sciences (Kungliga Ingeniörsvetenskapsakademien in Swedish)
- The International Volleyball Association was a short lived co-ed professional volleyball league in the United States from 1975 to 1979