The Ribnik is a river in western Bosnia and Herzegovina. It is a headwater tributary of the Sana, which it meat at Strane and Velije hamlets of the Gornji Ribnik village, 17 km below the Sana's own source springs, bringing in a large amounts of water to the still young Sana. It is among shortest of the Sana tributaries but at the same time among largest by the volume it discharges into the receiving Sana. The Ribnik is well known as a prime fly fishing fishery and is popular among anglers throughout the world.