Ruen (Bulgarian: Руен, pronounced [ˈruɛn]; Turkish: Ulanlı) is a village in southeastern Bulgaria, part of Burgas Province. It is the administrative centre of Ruen municipality, which lies in the northern part of Burgas Province.

Ruen municipality includes the following 41 places:

Bilka Cheresha Dobra Polyana Dobromir Daskotna Dropla Dyulya Kamenyak Karavelyovo Listets Lyulyakovo Mrezhichko Planinitsa Podgorets Preobrazhentsi Pripek Prosenik Razboyna Razhitsa Rechitsa Rozhden

Rudina Ruen Rupcha Shivarovo Sini Rid Skalak Snezha Snyagovo Sokolets Sredna Mahala Struya Topchiysko Tranak Vishna Vresovo Yabalchevo Yasenovo Zaimchevo Zaychar Zvezda

The population of the municipality is predominantly Turkish (see Turks in Bulgaria), with some Bulgarians, Roma and Pomaks.

42°48′N 27°17′E / 42.800°N 27.283°E / 42.800; 27.283