Sheets of Mongolia, 1981
| Issuer | Date | Desc | State | ||
| - |  |
Mongolia | 3/22/1981 | Soviet-Mongolian Space Flight, sheet of 1 type | all added |
| - |  |
Mongolia | 4/28/1981 | Stamp Exhibitions 1981, sheet of 4 types | all added |
| - |  |
Mongolia | 5/30/1981 | empty sheet (#16841) | incomplete |
| - |  |
Mongolia | 7/11/1981 | 20th Anniversary of United Nations Membership, sheet of 1 type | all added |
| - |  |
Mongolia | 9/1/1981 | 375th Anniversary of the Birth of Rembrandt, sheet of 1 type | all added |
| - |  |
Mongolia | 9/30/1981 | empty sheet (#16844) | incomplete |
| - |  |
Mongolia | 10/5/1981 | 50th Anniversary of "Graf Zeppelin" Polar Flight, sheet of 2, 1 type | all added |
| - |  |
Mongolia | 12/10/1981 | International Decade for Women, sheet of 1 type | all added |
| - |  |
Mongolia | 12/28/1981 | Intercosmos 1981, sheet of 8 types | all added |