Kosava or Kossovo (Belarusian: Косава; Russian: Коссово; Yiddish: קאסעוו, romanized: Kosev), formerly known as Kosava-Palyeskaye (Belarusian: Косава-Палескае, romanized: Kosava-Palieskaje, Polish: Kosów Poleski), is a town in Ivatsevichy District, Brest Region, in western Belarus.

Nearby is the ruined Kosava Castle, built by the Pusłowski family in 1830, and a replica of Tadeusz Kościuszko's house in Mereczowszczyzna.

It was a private town of the Chreptowicz, Sanguszko, Sapieha, Flemming, Czartoryski and Pusłowski noble families,[2] administratively located in the Slonim County in the Nowogródek Voivodeship.

[citation needed] Following the 1939 invasion of Poland, the town was first occupied by the Soviet Union until 1941, then by Nazi Germany until 1944.

In July 1944, the town was re-occupied by the Soviet Union, and eventually annexed from Poland the following year.