Gazaria (also Cassaria, Cacsarea, and Gasaria) was the colonial possessions of the Republic of Genoa in Crimea and around the Black Sea coasts in the territories of the modern regions of Russia, Ukraine and Romania, from the mid-13th century to the late 15th century. The Genoese rule was represented by a consul, and the capital of the Gazaria was the city of Kaffa (present-day Feodosia) in the Crimean peninsula.
The name Gazaria derives from Khazaria, though the Khazars had ceased to rule over the area well before the Genoese arrived.