T23 may refer to
The T23 series of the T20 Medium Tank (USA)
A member of the T20 series of the IBM ThinkPad portable computers family
SJ Tp, diesel locomotive designated T23
T-23 can refer to:
Aerotec Uirapuru, Brazilian military aircraft designated T-23
T-23 Tankette, Soviet tank
T23 of 4th torpedo boat flotilla of Elbing-class torpedo boat (Germany, 1941-1944)