Isti

Isti may refer to:
 * Isti (Greece), a town of ancient Greece
 * Isti, Iran, a village in the Ardabil Province of Iran
 * Isti (Hinduism), one of the five types of yajna in Vedic times
 * Istituto di Scienza e Tecnologie dell'Informazione, a research institute of the Consiglio Nazionale delle Ricerche in Italy