兹尔马尼亚河是克罗地亚的河流，河道全长69公里，流域面积907平方公里，平均流量每秒94立方米，是飘筏和皮艇运动的热门地点，河畔城镇有奥布罗瓦茨。

Zrmanja (pronounced [zř̩maɲa]) is a river in southern Lika and northern Dalmatia, Croatia. It is 69 km (43 mi) long and its basin covers an area of 907 km (350 sq mi).

It was known to the ancient Romans as Tedanius. The spring of Zrmanja is located in southern part of Lika under Postak - the southern peak of Pljesevica mountain, and close to south end of Velebit mountain. It is characteristic for its spring located on the bottom of very steep, almost 200 m high funnel shape rock called Misije. It flows southward through the narrow and long arable valley which encircles the southern end of Velebit through a 200-metre-deep canyon, and then turns westwards, reaches Obrovac, and after a few kilometers flows into the Adriatic sea in the bay named Novigradsko more.