Otok can refer to:
Otok is a municipality and a village in inland Dalmatia, Croatia, located east of Sinj, approximately 7 kilometers away. Otok is bordered by the river Cetina and mountain Kamešnica. The population of Otok is 3,090, with a total of 5,474 in the municipality which includes four other villages and a hamlet (Gala, Korita, Ovrlja, Ruda, and Udovičići).
Coordinates: 43°41′24″N 16°44′24″E / 43.69000°N 16.74000°E / 43.69000; 16.74000
Otok is a town in eastern Croatia, located 20 km south of Vinkovci, in eastern Slavonia. The population of the town of Otok is 6,343 (census 2011), with 4,694 residents in Otok itself and 1,649 in the nearby village of Komletinci. In the census of 2011, 99.31% of the population declared themselves Croats.