İsi is a talysh village and municipality in the Masally Rayon of Azerbaijan. It has a population of 186.
Isi was a 1975 single by the German band Neu!, released in the United Kingdom to promote their album Neu! '75. Like its predecessor Super/Neuschnee, Isi failed to chart and is now a collectors' item due to its rarity. It was sold in an unmarked paper sleeve by United Artists, who marketed Neu! in the UK.