T33 or T-33 may refer to:

• Alfa Romeo Tipo 33, an Italian racing car
• Bestune T33, a Chinese SUV
• Cooper T33, a British sports car

• Canadair T-33, a Canadian jet trainer
• Flader T33, an American turbojet engine
• Lockheed T-33, an American jet trainer

• T33 (classification), a disability sport classification
• German torpedo boat T33
• Kire-Uriwari Station, Osaka, Japan
• London Buses route T33
• Soviet minesweeper T-33
• T-37A tank, a Soviet light tank