XF-104	J65, no gun, no shock cone, short tail.
YF-104A	J79-GE-JA or 3B, short tail, no ventral fin.
F-104A	J79-GE-3B, short tail.
NF-104A	Research variant of the A model fitted with rocket motor above afterburner.
QF-104A	Drone version of the A model.
F-104B	Two-seat version of the A model, no gun, two canopy types.
F-104C	J79-GE-7A, short tail, IRF probe possible.
F-104D	Two-seat version of the C model, no gun.
F-104DJ	Japanese version of the D model.
F-104F	Two-seat trainer used by the German Air Force (Luftwaffe).
F-104G	J79-GE-11A, long tail, larger wheels, bulged main wheel doors.
TF-104G	Two-seat version of the G model, no gun.
RF-104G	Recce version of the G model, no gun, cameras.
F-104J	Japanese version, similar to CF-104 except that is has the gun.
F-104N	Ex-F-104As and Gs used by NASA.
F-104S	J79-GE-19, long tail, ventral fins, larger intakes, no gun, AIM-7 capability.
CF-104	Canadian built version of the G model, narrow main wheels and main wheel doors. Early CF-104s had no gun.
CF-104D	Two-seat version of the CF-104. As with the other two-seaters the CF-104D had no gun.