Tikhaya Sosna (Russian: Ти́хая Сосна́) is a river in Belgorod and Voronezh oblasts of Russia. It is a right tributary of the river Don. It is 161 kilometres long, with a drainage basin of 4,350 square kilometres.
The river has its sources in the eastern part of Belgorod Oblast, on the southeastern slopes of the Central Russian Upland. It flows in a northeasterly direction, and joins the Don some 15 kilometres. west of the town of Liski in Voronezh Oblast.
Along the Tikhaya Sosna lie the towns of Biryuch, Alexeyevka and Ostrogozhsk.
