İslâm I Giray (?–1537) was for five months 1532 Khan of the Crimean Khanate. He was preceded and followed his uncles Saadet I Girai (1524–1532) and Sahib I Giray (1532–1551). His father was Mehmed I Giray (1515–1523). Islam spent most of his life (1524–1537) trying to take the throne from his uncles. He was once Khan and twice Kalga or designated heir and co-ruler. He revolted three times, twice almost captured the khanship and once partitioned the Khanate between himself and his uncle. When not in Crimea he lived with the Nogai nomads.