Trostianets (Ukrainian: Тростянець) is a rural settlement in Vinnytsia Oblast (province), Ukraine, located in the historic region of Podilia.

The town is located on the Trostianets River, which is a tributary of the Southern Bug.

Historically, it was known as Adamhorod (Adamgrod), and was a private town in Poland, located in the Bracław Voivodeship, owned by the House of Potocki.

Until 26 January 2024, Trostianets was designated urban-type settlement.

On this day, a new law entered into force which abolished this status, and Trostianets became a rural settlement.