Bolivia
| 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 |
|---|---|---|---|---|---|---|
| 2025 | Mixed | MMP | 3 | 130 | 130 | TRS |
| 2020 | Mixed | MMP | 3 | 130 | 130 | TRS |
| 2019 | Mixed | MMP | 3 | 130 | 130 | TRS |
| 2014 | Mixed | MMP | 3 | 130 | 130 | TRS |
| 2009 | Mixed | MMP | 3 | 130 | 130 | TRS |
| 2005 | Mixed | MMP | 2 | 130 | 130 | Other |
| 2002 | Mixed | MMP | 2 | 130 | 130 | Other |
| 1997 | Mixed | MMP | 2 | 130 | 130 | Other |
| 1993 | PR | List PR | 1 | 130 | 130 | Other |
