Miercurea Sibiului (German: Reußmarkt; Transylvanian Saxon: Ruzmargt; Hungarian: Szerdahely) is a town in the west of Sibiu County, in southern Transylvania, central Romania, 34 km (21 mi) to the west of the county capital, Sibiu.

The river Apold and its left tributary, the Rod, flow through the village Apoldu de Sus.

Miercurea Sibiului is also situated on the Căile Ferate Române Line 200, which runs from Brașov to Curtici.

Since the 12th or 13th century the town was inhabited by Transylvanian Saxons and from 1355 it became one of the original seven seats of Saxondom from the Sibiu area.

The town is the place of birth of Ilie Măcelaru [ro] (1822–1891), a lawyer who participated in the 1848 revolution and a founding member of the Romanian National Party that was formed in Miercurea Sibiului on 17 March 1869.