The Korets Castle (Ukrainian: Корецький замок) is a castle built in Korets c. 1400 by either Prince Theodor Ostrogski or Prince Dymitr Korybut.

The moated castle on the bank of the Korchyk River was the seat of the princely House of Korets between the 15th and 17th centuries.

In 1780, Józef Klemens Czartoryski rebuilt the castle to serve as his main residence.

As Józef Klemens had no male issue, the castle was neglected after his death.

Over the years the ruins have steadily deteriorated and by the late 20th century have all but disappeared.