Lutsk (Ukrainian: ะัััะบ, IPA: [lutsสฒk] ; see below for other names) is a city on the Styr River in northwestern Ukraine. It is the administrative center of Volyn Oblast and the administrative center of Lutsk Raion within the oblast. Lutsk has a population of 220,986 (2022 estimate).
A city with almost a thousand years of history, recorded in 1085, Lutsk historically served as an administrative, cultural and religious center in Volhynia. The city contains several landmarks in various styles, including Renaissance, Baroque and Neoclassical, the most known being the medieval Lubart's Castle.