Sierra Leone
| 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 |
|---|---|---|---|---|---|---|
| 2018 | Plurality/Majority | FPTP | 1 | 132 | 146 | TRS |
| 2012 | Plurality/Majority | FPTP | 1 | 112 | 124 | TRS |
| 2007 | Plurality/Majority | FPTP | 1 | 112 | 124 | TRS |
| 2002 | PR | List PR | 1 | 112 | 124 | TRS |
| 1996 | PR | List PR | 1 | 68 | 80 | TRS |
