Tiridates (Old Armenian: Տրդատ, Trdat) may refer to:
- Parthia
- Tiridates I of Parthia (d. 211 BC), brother of Arsaces I
- Tiridates II of Parthia, ruled c. 30–26 BC
- Tiridates III of Parthia, ruled c. 35-36
- Armenia
- Tiridates I of Armenia, ruled c. 56-59 and 62-88
- Tiridates II of Armenia, ruled from 217-252
- Tiridates III of Armenia, ruled 287-330, also known as Tiridates the Great
- Tiridates, flourished 4th century and son of Tiran of Armenia
- Tiridates, a prince from the Bagratuni Dynasty who lived in the 4th century who was the husband of the Arsacid Princess Eranyak
- Trdat the Architect (c. 950-1020), chief architect of the Bagratuni Dynasty
Others
- Tiridates, a contemporary of Sohaemus of Armenia in the 2nd century
- Trdat of Iberia, also known as Tiridates of Iberia, ruled c. 394-406