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Battle of Piatka
Part of Kosiński uprising
Date February 2, 1593 Location Piatka, in modern Zhytomyr Oblast, Ukraine Result Polish-Lithuanian victory
Belligerents
Polish–Lithuanian Commonwealth	insurgent Cossacks
Commanders and leaders
Janusz Ostrogski, Aleksander Wiśniowiecki	Krzysztof Kosiński
Strength
Pospolite ruszenie of the voivodships: Kiev, Bratslav, Volhynian, private troops of Prince Janusz Ostrogski	5,000 Cossacks, 26 cannons
Casualties and losses
Very light	3,000 killed, 26 cannons

Battle of Piatka or Battle of Piątek (Ukrainian: П'ятка, Polish: Piątka, Piątek), (February 2, 1593) took place during the Kosiński Uprising. Polish–Lithuanian Commonwealth forces under the command of Janusz Ostrogski defeated the Cossacks forces under the command of Krzysztof Kosiński.

• Leszek Podhorodecki: Sicz zaporoska. Warszawa: Książka i Wiedza, 1978.
• Władysław A. Serczyk: Na dalekiej Ukrainie: Dzieje Kozaczyzny do 1648 roku. Wydawnictwo Literackie, 1984. ISBN 83-08-01214-0.