The border between Poland and Ukraine has been the subject of continuous change throughout the twentieth century due to various conflicts between Poland, Ukraine and Soviet Russia. The location of the frontier would remain unchanged following the 1960s, and it would be preserved after the creation of the liberal-democratic Republic of Poland in 1989 and the dissolution of the Soviet Union in 1991.

The international boundary between Poland and Ukraine begins at the tripoint with Slovakia in the south and runs for 546 kilometers (339 miles) in a general northeasterly direction before reaching the tripoint with Belarus. The location of the border has remained undisputed by both States. Poland and Ukraine have increased diplomatic, economic and military cooperation in response to the Russian invasion of Ukraine, and the two States maintain close relations.