Rivne Oblast (Ukrainian: Рівненська область, romanized: Rívnensʹka óblastʹ), also referred to as Rivnenshchyna (Ukrainian: Рівненщина, romanized: Rívnenščyna), is an oblast in western Ukraine. Its administrative center is Rivne. The surface area of the region is 20,100 square kilometres (7,800 sq mi). Its population is: 1,141,784 (2022 estimate).
Before its annexation by the Soviet Union during World War II, the region was part of the Second Polish Republic's Wołyń Voivodeship following the Polish–Soviet War. Previously it was part of the Volhynian Governorate.