Iraq
| 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 |
|---|---|---|---|---|---|---|
| 2021 | Plurality/Majority | SNTV | 1 | 329 | 329 | Not applicable |
| 2018 | PR | List PR | 1 | 329 | 329 | Not applicable |
| 2014 | PR | List PR | 1 | 328 | 328 | Not applicable |
| 2010 | PR | List PR | 1 | 325 | 325 | Not applicable |
| 2005 | PR | List PR | 2 | 275 | 275 | Not applicable |
