Sveti Grgur (Croatian pronunciation: [svȇtī gr̂guːr], Italian: San Gregorio) is an uninhabited island in Croatia, on the Adriatic Sea between Rab and Krk. The island was the site of a women's prison in communist Yugoslavia from 1948 to 1988.
Coordinates: 44°52′5″N 14°45′33″E / 44.86806°N 14.75917°E / 44.86806; 14.75917