Surname 长军 (长军 
, Changjun 
) , in all the world, is a common family name. The family name 长军 is habitual in Eastern Asia, particularly China, where it is a rare surname, and South Korea. More frequently, 长军 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 长军 | China |
| Changjun | Indonesia, China, South Korea, Taiwan, United States |