Sheets of Bulgaria, 1977
| Issuer | Date | Desc | State | ||
| - |  |
Bulgaria | 5/10/1977 | empty sheet (#5974) | incomplete |
| - |  |
Bulgaria | 6/7/1977 | International Writers Conference, empty sheet (#5970) | incomplete |
| - |  |
Bulgaria | 6/7/1977 | 1150th Birthday of Kyrillos, sheet of 1 type | |
| - |  |
Bulgaria | 6/29/1977 | empty sheet (#5971) | incomplete |
| - |  |
Bulgaria | 8/10/1977 | Universiade '77 b, sheet of 1 type | |
| - |  |
Bulgaria | 9/10/1977 | Soviet-Bulgarian Friendship 1977, sheet of 3, 1 type | |
| - |  |
Bulgaria | 9/23/1977 | 400th Birthday of Rubens, sheet of 1 type | all added |
| - |  |
Bulgaria | 10/5/1977 | Tourism 1977, sheet of 8, 2 types | all added |