KASSIMOW, a town of European Russia, capital of a cognominal circle, in the government of Riazan, and 70 miles E.N.E. of the town of that name. It stands at the junction of the Rivers Babinka and Oka, and is surrounded by a wall which has been formed into a pleasant promenade. The houses are mostly of wood. It carries on a considerable trade with the East in furs, silk, and cotton goods; and has some manufactures of cloth, leather, earthenware, &c. Under Tartar rule, it was a place of some note, having been the capital of a prince of that race. Some of the original Tartar inhabitants occupy one of the suburbs. Pop. (1849) 7781.