Kanisa Katoliki la Kigiriki la Ukraina (kwa Kiukraina: Українська Греко-Католицька Церква (УГКЦ), Ukrains'ka Hreko-Katolyts'ka Tserkva) ndiyo madhehebu kubwa zaidi kati ya Makanisa Katoliki ya Mashariki (yale yote ya Ukristo wa mashariki yenye ushirika kamili na Papa na Kanisa Katoliki lote). Mwaka 2014 lilikadiriwa kuwa na waamini 4,468,630 katika parokia 3,993 za Ukraina na za nchi nyingine zaidi ya 12 walipohamia Waukraina katika mabara 4, wakiongozwa na maaskofu 39, mapadri wanajimbo 3,008, mapadri watawa 399 na mashemasi 101. Pia lina watawa wengine wanaume 818 na wanawake 1459 mbali ya waseminari 671. Linafuata liturujia ya Ugiriki. "Account of the history of the Unia and its disestablishment in 19th Century Russia" in Russian Orientales Omnes Ecclesias, Encyclical on the Reunion of the Ruthenian Church with Rome His Holiness Pope Pius XII, Promulgated on December 23, 1945.  "Greek Catholics in America". Catholic Encyclopedia. New York: Robert Appleton Company. 1913. Gudziak, Borys A. (2001). Crisis and Reform: The Kyivan Metropolitanate, The Patriarchate of Constantinople, and the Genesis of the Union of Brest. Harvard University Press.