Ecuador
| 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 | PR | List PR | 3 | 137 | 137 | TRS |
| 2021 | PR | List PR | 3 | 137 | 137 | TRS |
| 2017 | PR | List PR | 3 | 137 | 137 | TRS |
| 2013 | PR | List PR | 3 | 137 | 137 | TRS |
| 2009 | PR | List PR | 3 | 124 | 124 | TRS |
| 2006 | PR | List PR | 1 | 100 | 100 | TRS |
| 2002 | PR | List PR | 1 | 100 | 100 | TRS |
| 1998 | PR | List PR | 2 | 120 | 120 | TRS |
| 1996 | PR | List PR | 2 | 82 | 82 | TRS |
| 1994 | PR | List PR | 2 | 77 | 77 | TRS |
