Peru
| 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 |
|---|---|---|---|---|---|---|
| 2021 | PR | List PR | 1 | 130 | 130 | TRS |
| 2020 | PR | List PR | 1 | 130 | 130 | TRS |
| 2016 | PR | List PR | 1 | 130 | 130 | TRS |
| 2011 | PR | List PR | 1 | 130 | 130 | TRS |
| 2006 | PR | List PR | 1 | 120 | 120 | TRS |
| 2001 | PR | List PR | 1 | 120 | 120 | TRS |
| 2000 | PR | List PR | 1 | 120 | 120 | TRS |
| 1995 | PR | List PR | 1 | 120 | 120 | TRS |
