The Orekhovka (, formerly Сандо-Вака Sando-Vaka)Словарь названий гидрографических объектов России и других стран — членов СНГ , Federal Service for Geodesy and Cartography of Russia, 1999, p. 287 is a river in Dalnerechensky District, Primorsky Krai, Russia. It is the longest tributary of Malinovka, which it enters about 111 km from the Malnikova's confluence with the Bolshaya Ussurka.
The Orekhovka drainage basin covers about . The river is long. The usual depth of the river is .Primpogoda.ru: Orekhovka River
There are two hydrologic posts on the river near the villages of Polyany and Yasnaya Polyana.
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