Ireland
| 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 | PR | STV | 1 | 159 | 160 | STV |
| 2016 | PR | STV | 1 | 158 | 158 | STV |
| 2011 | PR | STV | 1 | 166 | 166 | STV |
| 2007 | PR | STV | 1 | 166 | 166 | STV |
| 2002 | PR | STV | 1 | 166 | 166 | STV |
| 1997 | PR | STV | 1 | 166 | 166 | STV |
| 1992 | PR | STV | 1 | 166 | 166 | STV |
