It is named after its administrative centre - the town of Tryavna.
Dryanovo has a favourable geographical position, being situated 20 km away from Gabrovo, 24 km from Veliko Tarnovo, 17 km from Tryavna and about 30 km away from Sevlievo.
Before joining the Yantra River it passes through Plachkovtsi, Tryavna, Tsareva Livada, Dryanovo, Ganchovets, Sokolovo and Debelets.