Sheets of Mongolia, 1979
| Issuer | Date | Desc | State | ||
| - |  |
Mongolia | 1/5/1979 | International Year of the Child, sheet of 1 type | all added |
| - |  |
Mongolia | 5/3/1979 | empty sheet (#16824) | incomplete |
| - |  |
Mongolia | 5/15/1979 | 100th Anniversary of the Death of Sir Rowland Hill, sheet of 4 types | incomplete |
| - |  |
Mongolia | 9/15/1979 | BRASILIANA '79, sheet of 3 types | incomplete |
| - |  |
Mongolia | 11/24/1979 | Planet Exploration, sheet of 1 type | all added |