Itin

Itin, itín or ITIN may refer to
 * Individual Taxpayer Identification Number, a United States tax processing number
 * International Token Identification Number, a unique identifier of tokens build upon Blockchain technology
 * Ilya Itin (born 1967), Russian concert pianist
 * Vivian Itin (1894–1938), Russian writer
 * Itín, Chaco, a village and municipality in northern Argentina
 * Prosopis kuntzei, a South American leguminous tree known as itín
 * Itin., abbreviation of itinerary or itinerarium