The 1991 census, held before the War in Croatia (1991–1995), registered Otišić with a population of 1,006, out of which 996 were ethnic Serbs.

Otišić spreads on 51.01 km2, between mountain Svilaja on the southwest and 25-km long Peruća Lake - Power Plant Accumulation on the northeast.

There are the following hamlets or geographical parts of the village: Draga Otišićka, Gaj, Poljana, Ječmište, Krivošija, Dubrava, Ograde, Poljice Otišićko, Rudopolje Sinjsko, Svilaja, Ševina Njiva, Tavan, and Vlake.

The village of Otišić was inhabited by a large number of Serb brotherhoods, such as: Stojisavljević, Rnić, Borković, Dragić, Ustić, Arambasić, Gajić, Petrović, Meljanac, Krivosić, Zagorac, Krunić, Grubić, Vujasin and others.

There is some archeological interest of the area because of finding site from Stone Age and Roman Empire, and remains of an early Christian Church.