a town of Russia, in the government of Kiev, 23 m. by rail S.W. of the city of Kiev. Pop. 18,000, chiefly agricultural. Vasilkov was founded in the 10th century, but laid waste during the Mongol invasion of 1239-42. In 1320 it was taken by the Lithuanians, and later by the Poles, under whom it remained until 1686, when it was annexed to Russia.