Nigeria
| 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 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 2019 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 2015 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 2011 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 2007 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 2003 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
| 1999 | Plurality/Majority | FPTP | 1 | 360 | 360 | TRS |
