Mauritania
| 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 | Mixed | Parallel | 3 | 176 | 176 | TRS |
| 2018 | Mixed | Parallel | 3 | 157 | 157 | TRS |
| 2013 | Mixed | Parallel | 3 | 146 | 146 | TRS |
| 2006 | Plurality/Majority | TRS | 1 | 95 | 95 | TRS |
| 2001 | Plurality/Majority | TRS | 1 | 81 | 81 | TRS |
| 1996 | Plurality/Majority | TRS | 1 | 79 | 79 | TRS |
| 1992 | Plurality/Majority | TRS | 1 | 79 | 79 | TRS |
