Volhynia, is a historic region in Central and Eastern Europe, between southeastern Poland, southwestern Belarus, and western Ukraine. The borders of the region are not clearly defined, but the territory that still carries the name is Volyn Oblast, in western Ukraine.

Western Ukraine or West Ukraine refers to the western territories of Ukraine. There is no universally accepted definition of the territory's boundaries, but the contemporary Ukrainian administrative regions (oblasts) of Chernivtsi, Ivano-Frankivsk, Lviv, Ternopil and Zakarpattia are typically included. In addition, Volyn and Rivne Oblasts are also usually included. It is less common to include the Khmelnytskyi Oblasts in this category. It includes several historical regions such as Carpathian Ruthenia, Halychyna including Pokuttia, most of Volhynia, northern Bukovina and the Hertsa region, and Podolia. Western Ukraine is sometimes considered to include areas of eastern Volhynia, Podolia, and the small northern portion of Bessarabia.