Ciovo is an island located off the Adriatic coast in Croatia with an area of 28.8 square kilometres (11.1 sq mi) (length 15.3 km (9.5 mi), width up to 3.5 km (2.2 mi)), population of 5,908 inhabitants (2011) and its highest peak is 218 m (Rudine).

Ciovo is located in central Dalmatia, protecting the town of Trogir and Kaštela gulf. On its SE part it is only two km distant from the cape Marjan, on its northern part it is connected to the mainland with a small bascule bridge in the old centre of Trogir, and actually Trogir spread itself onto the island. Besides the portion of Trogir, on the island there are several villages.

The vegetation is typically Mediterranean, consisting mainly in understory (holm oak, myrtle, wormwood, juniper etc.). On the northern side (exposed to the wind bura) are forests of pine and cypress. Major crops include olives, figs, almonds, vines and citrus fruit.

Since 1964 the island was connected by a bridge to Trogir which is itself connected to the mainland by another bridge. The development of tourism though generated so much traffic that this connection suffered severe capacity shortages in high season.

A construction of a new bridge which connects Ciovo directly with the mainland began in February 2015. It was opened to traffic on July 17th 2018. The new 546,34 m long bascule bridge is located in about 1 km East the old one. Its navigational clearance when spans are closed is 6 metres.