Istriot is a Romance language spoken in the Western Region on the coast of the Istrian Peninsula (especially in the towns of Rovinj (Rovigno) and Vodnjan (Dignano)), on the upper northern part of the Adriatic Sea, in Croatia.

It's speakers never called it "Istriot", but it had six names after the six towns where it was spoken (in Dignano it was named "bumbaro", in Valle "vallese", in Rovigno "rovignese", in Sissano "sissanese", in Fasana "fasanese" and in Gallesano "gallesanese"). The name Istriot was given by the 19th century Italian linguist Graziadio Isaia Ascoli.

There are currently only about 1,000 speakers left, thus, making it an endangered language.