Black Sea Cossack Host, also known as Chernomoriya, was a Cossack host of the Russian Empire created in 1787 in southern Ukraine from former Zaporozhian Cossacks. In the 1790s, the host was re-settled to the Kuban River. It comprised the Caucasus Fortified Defence Line from the mouth of the Kuban River to the mouth of the Bolshaya Laba River.

Kuban Cossacks, or Kubanians, are Cossacks who live in the Kuban region of Russia. Most of the Kuban Cossacks are descendants of different major groups of Cossacks who were re-settled to the western Northern Caucasus in the late 18th century. The western part of the region was settled by the Black Sea Cossack Host who were originally the Zaporozhian Cossacks of Ukraine, from 1792. The eastern and southeastern part of the host was previously administered by the Khopyour and Kuban regiments of the Caucasus Line Cossack Host and Don Cossacks, who were re-settled from the Don from 1777.