The West Ukrainian National Republic (Західно-Українська Народна Республика, Zakhidno-Ukrayins’ka Narodna Respublyka or ЗУНР, ZUNR; also translated "West Ukrainian People's Republic") was a short-lived republic that existed in late 1918 and early 1919 in eastern Galicia, that claimed parts of Bukovina and Carpathian Ruthenia and included the cities of Lviv, Peremyshl', Kolomyia, and Stanislaviv. According to the Austro-Hungarian census of 1910, the territory claimed by the West Ukrainian People's Republic had about 5.4 million people. Of these, 3,291,000 (approximately 60%) were Ukrainians, 1,351,000 (approximately 25%) were Poles, 660,000 (approximately 12%) were Jews, and the rest included Germans, Czechs and others. The cities and towns of this largely rural region were mostly populated by Poles and Jews, while the Ukrainians dominated the countryside. This would prove problematic for the Ukrainians, because the largest city, Lviv (Lemberg, Lwów, Lvov), had a majority Polish population and was considered to be one of the most important Polish cities. Conflict between the West Ukrainian People's Republic and Poland was thus inevitable.

The coat of arms of the West Ukrainian People's Republic was a yellow lion on the blue field looking to the right. The colors of the flag were blue and yellow.