Bulgaria
| Year | Electoral system family | Electoral system for national legislature | Number of tiers | Legislative size (directly elected) | Legislative size (voting members) | Electoral system for the president |
|---|---|---|---|---|---|---|
| 2023 | PR | List PR | 1 | 240 | 240 | TRS |
| 2022 | PR | List PR | 1 | 240 | 240 | TRS |
| 2021 | PR | List PR | 1 | 240 | 240 | TRS |
| 2017 | PR | List PR | 1 | 240 | 240 | TRS |
| 2014 | PR | List PR | 1 | 240 | 240 | TRS |
| 2013 | PR | List PR | 1 | 240 | 240 | TRS |
| 2009 | Mixed | Parallel | 2 | 240 | 240 | TRS |
| 2005 | PR | List PR | 1 | 240 | 240 | TRS |
| 2001 | PR | List PR | 1 | 240 | 240 | TRS |
| 1997 | PR | List PR | 1 | 240 | 240 | TRS |
| 1994 | PR | List PR | 1 | 240 | 240 | |
| 1991 | PR | List PR | 1 | 240 | 240 | TRS |
