The Polish Border Guard is a state security agency tasked with patrolling the Polish border. It existed in the Second Republic era from 1928 to 1939 and was reestablished in the modern-day Third Republic in 1990, going into operation the following year. During the communist era lasting from 1945 to 1989, the role of the border guard was carried out by the Border Protection Troops.

Border Protection Troops, also known under its English abbreviation BPT, was the border guard service of the People's Republic of Poland from 1945 to 1989. During its 46 years of existence, it has repeatedly changed its structural and service subordination, passing from the Ministry of National Defense through the Ministry of Public Security to the Ministry of the Interior, and vice versa, to remain under the Ministry of Interior since 1972. Border Protection Troops soldiers were subject to the same rules and regulations as those of other soldiers of the Polish People's Republic. As a result of political transformation and the setup of the Third Polish Republic, the Border Protection Troops were disbanded on May 16, 1991, and the Border Guard was created in their place as a preventive-type police formation established to protect Poland's borders.