Luhansk (, ; , ), also known as Lugansk (, ; , ), is a city in the Donbas in eastern Ukraine. As of 2022, the population was estimated to be making Luhansk the 12th-largest city in Ukraine.

Luhansk served as the administrative center of Luhansk Oblast, before pro-Russian separatists seized control of the city in 2014 and made it the capital of the self-proclaimed Luhansk People's Republic.