Kupa ( This article needs cleanup. ...Slovenian Kolpa) is a river in The Republic of Croatia is a crescent_shaped country in Europe bordering the Mediterranean, Central Europe and the Balkans. ...Croatia and on the border with The Republic of Slovenia ( Slovenian: Republika Slovenija) is a coastal sub_Alpine country in south central Europe bordering Italy to the west, the Adriatic Sea to the southwest, Croatia to the south and east, Hungary to the northeast, and Austria to the north. ...Slovenia.

The Kupa originates in the mountainous region of Gorski Kotar, northeast of Rijeka (Fiume in Italian and Hungarian; Rijeka and Fiume both mean river) is the principal seaport of Croatia, located on the Kvarner Bay, an inlet of the Adriatic Sea. ...Rijeka. It flows a few kilometers eastwards, receives the small river Čabranka from the left, before reaching the Slovenian border. It then continues eastwards, receives influx from the river Lahinja from the left, passes Vrbovsko, and eventually detaches from the Slovenian border. It then reaches the city of Karlovac is a city in central Croatia with 59,395 inhabitants (2001), center of the Karlovac county. ...Karlovac, where it receives influx from two other rivers from the right, Dobra and Korana (which in turn is joined by Mrežnica). It continues flowing to the east, where it merges with Glina from the right as well as Odra from the left, and proceeds to the city of Sisak is a city in central Croatia at the confluence of the Kupa and Sava rivers, 57 km southeast of Croatian capital Zagreb with an elevation of 99 m. ...Sisak where it flows into the Sava can mean several things: for polynesian mythology creature see Sava (mythology), see Sava (river) for a river in central_southern Europe see Sava (name) for south Slavic name, see Saint Sava for Serbian medieval prince turned monk (1176 _ 1235). ...Sava.