Sheets of Bulgaria, 1981
| Issuer | Date | Desc | State | ||
| - |  |
Bulgaria | 1/9/1981 | Olympic Fame, sheet of 1 type | |
| - |  |
Bulgaria | 3/12/1981 | Bulgarian Communist Party Congress 1981, sheet of 1 type | |
| - |  |
Bulgaria | 3/27/1981 | World Cup 1982 in 1981, sheet of 1 type | |
| - | no image | Bulgaria | 3/27/1981 | empty sheet (#6033) | incomplete |
| - |  |
Bulgaria | 5/15/1981 | 125th Anniversary of the European Danube Commission, sheet of 2 types | |
| - |  |
Bulgaria | 5/27/1981 | sheet of 1 type | |
| - |  |
Bulgaria | 8/10/1981 | 1300th Anniversary of the First Bulgarian State, sheet of 1 type | |
| - |  |
Bulgaria | 9/3/1981 | sheet of 1 type | |
| - |  |
Bulgaria | 9/25/1981 | 125th Anniversary of the European Danube Commission b, sheet of 8 types | |
| - |  |
Bulgaria | 10/6/1981 | empty sheet (#6040) | incomplete |
| - |  |
Bulgaria | 12/13/1981 | empty sheet (#6037) | incomplete |