The Treaty of Buchach was signed on 18 October 1672 in Buczacz (now Buchach, Ukraine) between the Polish–Lithuanian Commonwealth under King Michał Korybut Wiśniowiecki, who had been unable to raise a suitable army, on the one side and the Ottoman Empire on the other side, ending the first phase of the Polish-Ottoman War (1672-1676).
Under the treaty Poland:
- ceded territory of Podolian Voivodeship to the Ottomans
- agreed to pay a yearly tribute of 22,000 Thaler
- ceded territory of Bratslav Voivodeship and southern Kiev Voivodeship to the Cossack Hetmanate (Ottoman Ukraine), which fought alongside the Ottomans under Petro Doroshenko.
- Davies 2007, p. 156.
- Davies, Brian L (2007). Warfare, State and Society on the Black Sea Steppe, 1500–1700. London: Routledge. ISBN 9780415239851.