Starobilsk is a city in Luhansk Oblast, Ukraine. It serves as the administrative center of Starobilsk Raion. The modern settlement was founded in 1686, and it was granted city status in 1938. The city has a population of 15,947. As a result of the Russian invasion of Ukraine, it has been under Russian occupation since March 2, 2022.

Luhansk Oblast, also referred to as Luhanshchyna (Луганщина), is the easternmost oblast (province) of Ukraine. Its administrative center is the city of Luhansk. The oblast was established in 1938 and bore the name Voroshilovgrad Oblast until 1958 and again from 1970 to 1991. It has a population of 2,102,921.