The Battle of Loyew (Belarusian: Бітва пад Лоевам, Ukrainian: Битва під Лоєвом, Polish: Bitwa pod Łojowem; 6 July 1651) was fought between the Polish–Lithuanian Commonwealth against the Cossack Hetmanate as a part of the Khmelnytsky Uprising.

Near the site of the present-day town of Loyew on the Sozh River in Belarus, the Polish–Lithuanian Commonwealth’s forces under the command of Prince Janusz Radziwiłł and Mirski attacked and defeated a forces of the Zaporozhian Cossacks under the command of Colonels Martyn Nebaba, Stepan Pobodailo and Prokip Shumeyko with Lytvynenko.

Just a few weeks after the Battle of Berestechko, Bohdan Khmelnytsky managed to gather the scattered Cossacks and, supported by the Tatars , once again posed a serious threat.

Janusz Radziwiłł headed the Lithuanian troops (11 Lithuanian cavalry banners, including 2 Tatar banners of Sienkiewicz and Murza, a total of 4,000 soldiers) to meet the Crown troops, defeating on July 6 the Cossack covering units of Colonel Martyn Nebaba (15,000 mainly infantry) marching towards Gomel near Łojów on the Dnieper.

The victorious Lithuanian Field Hetman, after liberating a three-thousand-strong Cossack cavalry unit besieged in Krzyczew, captured Kiev on August 4