Editing Northrop F-5 (section)

===Single-seat versions===
[[File:Three F-5E agressors from Alconbury 1983.jpg|thumb|A trio of USAF [[aggressor squadron]] F-5Es in formation]]
[[File:F5 Brazilian Air Force.jpg|thumb|Brazilian Air Force F-5EM]]

;N-156F
: Single-seat fighter prototype. Only three aircraft were built.
;YF-5A
: The three prototypes were given the US Air Force designation ''YF-5A''.<ref>{{cite web |title=Northrop YF-5A Freedom Fighter |url=https://www.nationalmuseum.af.mil/Visit/Museum-Exhibits/Fact-Sheets/Display/Article/196074/northrop-yf-5a-freedom-fighter/ |website=National Museum of the U.S. Air Force |publisher=United States Air Force}}</ref>
;F-5A
: Single-seat fighter version of F-5, originally without radar, but was later equipped with [[AN/APQ-153]] radar during upgrades.
;F-5A (G)
: Single-seat fighter version of the F-5A for the [[Royal Norwegian Air Force]].
;XF-5A
: Designation was given to one aircraft used for static tests.
;A.9
: Designation of [[Spanish Air and Space Force]] Northrop F-5As.
;F-5C ''Skoshi Tiger''
: Twelve F-5A Freedom Fighters were tested by the US Air Force for four and a half months in Vietnam. Modified at Palmdale plant by adding removable, non retractable air-refueling probe on the left side, 90 lb of external armor plates under the cockpit and engine, and jettisonable stores pylons.<ref>{{cite web |title=USAF Vietnam Operations |url=https://www.the-northrop-f-5-enthusiast-page.info/AirForces/USAFVietnamOperations.html |website=The Northrop F-5 Enthusiast Page |access-date=18 April 2021 |archive-date=18 April 2021 |archive-url=https://web.archive.org/web/20210418011603/https://www.the-northrop-f-5-enthusiast-page.info/AirForces/USAFVietnamOperations.html |url-status=dead}}</ref>
;F-5E Tiger II
: Single-seat fighter version with [[AN/APQ-159]], replacing earlier AN/APQ-153.
;F-5E Tiger III
[[File:Chile Air Force Northrop F-5E Tigre III Lofting-1.jpg|thumb|Chilean Air Force F-5E Tiger III]]
: Upgraded version of the F-5E in use by the [[Chilean Air Force]], with [[EL/M-2032]] radar replacing the original AN/APQ-159 and capable of firing advanced versions of the [[Python (missile)|Python]] missile
;F-5E/F
: A single, prototype built for the Swiss Air Force, comprising an F-5E fuselage and tail section, with wings from an F-5F. As of 2011, this aircraft was at the [[Meiringen Air Base]] Museum.
;F-5G
: The temporary designation given to the [[Northrop F-20 Tigershark]], equipped with [[General Electric]] [[AN/APG-67]] radar.
;F-5N
: Ex-Swiss Air Force F-5Es used by the US Navy as an "adversary" aircraft, with [[AN/APG-69]] replacing the original AN/APQ-159. Intended to replace high-time USN/USMC F-5Es in the adversary role, and saw service through 2015.<ref name="USN F-5N" />
;F-5S
: Upgraded version of the F-5E, was in use with the [[Republic of Singapore Air Force]], equipped with the Galileo Avionica's FIAR Grifo-F X-band radar and are capable of firing the [[AIM-120 AMRAAM]].<ref name ="AFM275"/><ref name="FSRSAF" /><ref name="FGBRF5" />
;F-5TH Super Tigris
: Formerly known as the ''F-5T Tigris'' before being officially redesignated. An upgraded version of the F-5E of [[Royal Thai Air Force]] by Israel's [[Elbit Systems]] and Thai's RV Connex, it has a new glass cockpit and [[head-up display]] upgrade and equipped with [[EL/M-2032]] radar, RTAF-developed Link-T/TH tactical [[datalink]], [[Sky Shield]] jamming pod and are capable of firing the [[AIM-9 Sidewinder#AIM-9M (USAF/USN)|AIM-9M]], [[IRIS-T]], [[Python (missile)|Python-4]] and beyond visual range air-to-air [[Derby (missile)|Derby missile]].<ref>{{Cite web|date=24 February 2023|title=RTAF completes upgrades to F-5 fighter aircraft fleet|url=https://www.janes.com/defence-news/news-detail/rtaf-completes-upgrades-to-f-5-fighter-aircraft-fleet|website=Janes}}</ref><ref>{{Cite web|date=13 November 2019|title=อัพเกรดแล้ว "F-5TH" เสือโคตรดุ ทอ.ไทย เทียบชั้นเครื่องขับไล่ยุค 4.5|url=https://www.thairath.co.th/news/politic/1702723|website=Thairath}}</ref>
;F-5EM
: Upgraded version of the F-5E of [[Brazilian Air Force]] equipped with Italian [[Grifo radar#Grifo-F|Grifo-F radar]].
;F-5TIII
: Upgraded version of the F-5E, in service with the Royal Moroccan Air Force.
;F-5E Tiger 2000
: Upgraded version of Taiwan AIDC, equipped with the GD-53 radar, capable of firing the [[Sky Sword II|TC-2 Sky Sword II]], MIL-STD-1553B Link and GPS/INS. This variant did not enter service as the ROCAF decided to acquire additional F-16s instead to completely replace its F-5E/Fs.{{Citation needed|date=March 2020}}
;F-5/2000
: The F-5/2000 modernisation programme for the [[Turkish Air Force]] was to upgrade the aircraft, to serve as lead-in trainers for the F-16 force, by [[Israeli Aerospace Industries]] and [[Turkish Aerospace]]. The upgrade covers two areas – with a structural upgrade as well as an avionics modernisation such as MIL-STD-553 datalink, HUD, MFD, HOTAS, RWR, GPS+INS and [[ASELSAN]] CNI system.<ref>{{Cite web|url=https://www.savunmasanayist.com/turkiyenin-f-5a-b-freedom-fighter-seruveni/|title=Türkiye'nin F-5A/B Freedom Fighter Serüveni &#124; SavunmaSanayiST|first=Muhammed|last=Ayyildiz|date=13 August 2020}}</ref>
;B.Kh.18
: ({{langx|th|บ.ข.๑๘}}) [[Royal Thai Air Force]] designation for the F-5A.<ref name=":2">{{Cite web |title=Thai Military Aircraft Designations |url=https://designation-systems.net/non-us/thailand.html |access-date=2025-03-18 |website=designation-systems.net}}</ref>
;B.Kh.18B
: ({{langx|th|บ.ข.๑๘ข}}) Royal Thai Air Force designation for the F-5E.<ref name=":2" />
;A.9
:[[Spanish Air Force]] designation for the F-5.  Originally designated '''C.9'''.<ref>{{Cite web |title=Spanish Military Aircraft Designations |url=https://www.designation-systems.net/non-us/spain.html |access-date=2025-03-21 |website=www.designation-systems.net}}</ref>