| 121st Fighter Squadron | |
|---|---|
 General Dynamics F-16D Block 30 Fighting Falcon (s/n 85-1509) from the 121st Fighter Squadron | |
| Active | 10 April 1941 – present |
| Country | United States |
| Branch | Air National Guard |
| Type | Squadron |
| Role | Fighter |
| Part of | District of Columbia Air National Guard |
| Garrison/HQ | Joint Base Andrews, Camp Springs, Maryland |
| Nickname(s) | Capital Guardians |
| Tail Code | "DC" Red tailstripe w/stars |
| Battle honours | World War II Operation Southern Watch Operation Northern Watch Operation Iraqi Freedom Operation Enduring Freedom April 2024 Iranian strikes against Israel |
| Insignia | |
| 121st Fighter Squadron emblem |  |
| Patch with 121st Fighter-Interceptor Squadron emblem (approved 4 September 1951)[1] |  |
| 121st Liaison Squadron emblem |  |
The 121st Fighter Squadron (121 FS) is a unit of the District of Columbia Air National Guard 113th Wing located at Joint Base Andrews, Camp Springs, Maryland. The 121st is equipped with the Block 30 F-16C/D Fighting Falcon.
The squadron is a descendant organization of the 121st Observation Squadron, established on 10 July 1940. It is one of the 29 original National Guard Observation Squadrons of the United States Army National Guard formed before World War II.
- ^ Maurer, Combat Squadrons, pp. 348-349