OMIS, a small town and port at the mouth of the Cetina river in the littoral of Poljica, 26 km southeast of Split; population 6,079. Extensive sand beaches stretch from Dugi Rat in the west to Ravnice in the east. A 700-m wide shallow stretches off the low sand coast west of Omis, created by the drifts of the Cetina; it has a changing depth (up to 2 m).

Situated at the impressive confluence of the Cetina into the sea (with a modern bridge, which makes part of the surroundings), Omis is known as a mediaeval pirate centre. Picturesque mountains and the river enclose the urban core with fortresses. On the coast is an almost 1-km long sand beach (ideal for children) and the 700-m long shallow, created by the Cetina drifts. Major attractions include quality accommodation facilities, good traffic connections, gastronomic offer (the hinterland of Omis is famous for wholesome foods) and the Cetina canyon - Zadvarje - Gubavica. In the vicinity is also the well-known restaurant in Radmanove Mlinice (water mills), which offers local specialities.

Omis provides numerous sports and recreational facilities; football and basketball playgrounds, tennis courts, boccia alleys; beach volleyball may be played on the beach. There are 30 free climbing trails on the cliffs of the Cetina canyon; water sports equipment is rented; a swimming marathon for recreation enthusiasts is regularly organized.