Armenia
| 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 | PR | List PR | 1 | 107 | 107 | Not applicable |
| 2018 | PR | List PR | 1 | 132 | 132 | Not applicable |
| 2017 | PR | List PR | 1 | 105 | 105 | Not applicable |
| 2012 | Mixed | Parallel | 2 | 131 | 131 | TRS |
| 2007 | Mixed | Parallel | 2 | 131 | 131 | TRS |
| 2003 | Mixed | Parallel | 2 | 131 | 131 | TRS |
| 1999 | Mixed | Parallel | 2 | 131 | 131 | TRS |
| 1995 | Mixed | Parallel | 2 | 190 | 190 | TRS |
