Iran, Islamic Republic of
| 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 |
|---|---|---|---|---|---|---|
| 2020 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 2016 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 2012 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 2008 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 2004 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 2000 | Plurality/Majority | TRS | 1 | 290 | 290 | TRS |
| 1996 | Plurality/Majority | TRS | 1 | 270 | 270 | TRS |
| 1992 | Plurality/Majority | TRS | 1 | 270 | 270 | TRS |
