Sheets of Mongolia, 1991
| Issuer | Date | Desc | State | ||
| - |  |
Mongolia | 2/10/1991 | Flintstones, sheet of 1 type | incomplete |
| - |  |
Mongolia | 2/10/1991 | Flintstones, sheet of 1 type | incomplete |
| - |  |
Mongolia | 2/10/1991 | Jetsons, sheet of 1 type | incomplete |
| - |  |
Mongolia | 2/10/1991 | Jetsons, sheet of 1 type | incomplete |
| - |  |
Mongolia | 3/3/1991 | sheet of 1 type | all added |
| - |  |
Mongolia | 3/3/1991 | sheet of 1 type | all added |
| - |  |
Mongolia | 3/3/1991 | empty sheet (#16939) | incomplete |
| - |  |
Mongolia | 3/3/1991 | empty sheet (#16940) | incomplete |
| - |  |
Mongolia | 3/10/1991 | empty sheet (#16941) | incomplete |
| - |  |
Mongolia | 4/15/1991 | sheet of 1 type | all added |
| - |  |
Mongolia | 4/30/1991 | empty sheet (#16944) | incomplete |
| - |  |
Mongolia | 5/1/1991 | empty sheet (#16942) | incomplete |
| - |  |
Mongolia | 5/1/1991 | empty sheet (#16943) | incomplete |
| - |  |
Mongolia | 5/30/1991 | empty sheet (#16946) | incomplete |
| - |  |
Mongolia | 6/18/1991 | empty sheet (#16947) | incomplete |
| - |  |
Mongolia | 7/11/1991 | empty sheet (#16948) | incomplete |
| - |  |
Mongolia | 9/30/1991 | empty sheet (#16949) | incomplete |
| - |  |
Mongolia | 10/29/1991 | empty sheet (#16945) | incomplete |
| - |  |
Mongolia | 11/10/1991 | empty sheet (#16951) | incomplete |
| - |  |
Mongolia | 12/1/1991 | empty sheet (#16950) | incomplete |
| - |  |
Mongolia | 12/31/1991 | empty sheet (#16952) | incomplete |
| - |  |
Mongolia | 12/31/1991 | empty sheet (#16953) | incomplete |
| - |  |
Mongolia | 12/31/1991 | empty sheet (#16954) | incomplete |
| - |  |
Mongolia | 12/31/1991 | empty sheet (#16955) | incomplete |