Sibiu (Romanian pronunciation: [siˈbiw], antiquated, Sibiiu; German: Hermannstadt, Hungarian: Nagyszeben) is a city in Transylvania, Romania, with a population of 155,000. Located some 282 km north-west of Bucharest, the city straddles the Cibin River, a tributary of the river Olt. Nowadays the capital of Sibiu County, between 1692 and 1791 Sibiu was the capital of the Principality of Transylvania.

Sibiu is one of the most important cultural centres of Romania and, in tandem with Luxembourg, it was designated a European Capital of Culture for the year 2007. Formerly the centre of the Transylvanian Saxons, the old city of Sibiu was ranked as "Europe's 8th most idyllic place to live" by Forbes.

The city administers the ski resort Păltiniş.