Ista or ISTA may refer to:
People Ernest Ista (1877–unknown), Belgian sports shooter, competitor at the 1908 Summer Olympics Kevyn Ista (born 1984), Belgian road bicycle racer the heroine of Paladin of Souls, a novel by Lois McMaster Bujold
Acronym Indiana State Teachers Association Institute of Science and Technology Austria, a research institution International School of Temple Arts, an organization promoting alternative sex practices based on Western readings of tantra and shamanism International School of Theatre Anthropology (since 1979), based in the Odin Teatret, Denmark International School of Traditional Aikido, founded in France. International Schools Theatre Association, based in the United Kingdom, networked in schools such as The British School, New Delhi or Koç School International Seed Testing Association, an international non-profit seed testing organization International Society for Technology Assessment, related to Bryan Jennett, Fred Polak Internet Sacred Text Archive (since 1999), archive of cultural public domain texts
Other uses -ista, a suffix used in Romance languages and occasionally in English Ista (Bangladesh), a place in the Jessore District, Khulna Division of Bangladesh Ista Pharmaceuticals or ISTA Pharmaceuticals, related to Calvin A. Grant, Hyaluronidase
See also Ister (disambiguation)