Editing Northrop F-5 (section)

===Two-seat versions===
[[File:AE.9-00123-23 F-5M Freedom Fighter Ala 23 Spanish Air Force Dijon AB 2008.jpg|thumb|A Spanish F-5M Freedom Fighter at [[Dijon Air Base]] ]]
[[File:Northrop F-5F Tiger II, Bahrain - Air Force AN2253130.jpg|thumb|right|A Bahraini Air Force F-5F on the taxiway at [[RAF Alconbury]]]]

;F-5-21
:Temporary designation for the YF-5B.
;YF-5B
:One F-5B was fitted with a 5,000&nbsp;lbf (2,268&nbsp;kgf) General Electric J85-GE-21 engine, and used as a prototype for the F-5E Tiger II.
;F-5B
:Two-seat trainer version.
;F-5B(G)
:Two-seat trainer version of the F-5B for the Royal Norwegian Air Force.
;F-5BM
:Two-seat trainer version in use by the [[Spanish Air and Space Force]] for air combat training.
;F-5D
:Unbuilt trainer version.
;F-5F Tiger II
:Two-seat trainer version of F-5E Tiger II, AN/APQ-167 radar tested, intended to replace AN/APQ-157, but not carried out.
;F-5F Tiger III
:Upgraded trainer version of the F-5F in use by the Chilean Air Force.
;F-5T
:Upgraded F-5F, was in service with the [[Republic of Singapore Air Force]].<ref name="AFM275"/>
;F-5THF (บ.ข.18 ค){{#tag:ref|The designation '''THF''' is unofficial since the Royal Thai Air Force only designated it in Thai, not in English.{{Citation needed|date=December 2020}}|group="N"}}
:Twin-seat version of F-5TH in service with the [[Royal Thai Air Force]] as of May 2020.
;F-5FM
:Upgraded trainer version of the F-5F for the [[Brazilian Air Force]].
;AE.9
:Spanish designation of the Northrop F-5B.
;B.Kh.18A
: ({{langx|th|บ.ข.๑๘ก}}) Royal Thai Air Force designation for the F-5B.<ref name=":2" />
;B.Kh.18C
: ({{langx|th|บ.ข.๑๘ค}}) Royal Thai Air Force designation for the F-5F.<ref name=":2" />