The Maksym Zalizniak oak tree (Ukrainian: Дуб Максима Залізняка, romanized: Dub Maksyma Zaliznyaka) is a natural monument in Ukraine. It is located near the Buda village in Cherkasy Raion of Cherkasy Oblast, Ukraine, and cared for by the National Historical and Cultural Preserve "Chyhyryn" [uk]. The tree took 3rd prize in the "National Tree of Ukraine" national competition in 2010. Being over 1,100 year old, it is one of the oldest and biggest trees in Ukraine and Europe. It is named after Maksym Zalizniak, a leader of the Koliivshchyna rebellion of haidamaks in 1768. Its trunk is 9 metres in circumference and is about 30 metres (98 ft) tall.

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