The Vikšrupis is a river of Kėdainiai district municipality, Kaunas County, central Lithuania. It flows for and has a basin area of . The river is a right tributary of the Šušvė.
It starts near Jakšiai village, then flows to the west through the Pernarava-Šaravai Forest. The lower course is designated as the Pavikšrupys Botanical Zoological Sanctuary.
The hydronym Vikšrupis is a compound noun which the first root vikšr- could mean either 'rush' (vikšris) or 'caterpillar' (vikšras) while the second root up- means 'river' (upė).
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