Serving Tatars (Tatar: йомышлы татарлар, Yomışlı Tatarlar; Russian: Служилые татары) were a class of ethnically Tatars state servants in Muscovy and Russia in 14th-18th centuries.
Originally this class was formed Tatar nobles from Golden Horde and Tatar khanates that enjoyed membership of the Russian service class. Later, qara xalıq (black people) peasants of Kazan Khanate enjoyed this status after the fall of khanate in 1552. Their own ownership of shares in state land were granted to Russian and Qasim nobles.
The elite of the Serving Tatars were those served as translators, scribes, clerks, ambassadors to Central Asian countries and so on. The majority participated in Livonian war of 1558-1583, as well as other campaigns. They also, with the Cossacks, protected the Eastern borders of Russia, especially in the modern Orenburg Oblast. Unlike most Tatars, they had the right to use firearms and some of them became officers in the Russian Army.
Serving Tatars received land, financial support and food. They also had privileges in handicraft production and trade. In the 18th century they were reclassified as members of the class of State Peasants.