Saint Lucia
| 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 | FPTP | 1 | 17 | 17 | Not applicable |
| 2016 | Plurality/Majority | FPTP | 1 | 17 | 17 | Not applicable |
| 2011 | Plurality/Majority | FPTP | 1 | 17 | 17 | Not applicable |
| 2006 | Plurality/Majority | FPTP | 1 | 17 | 17 | Not applicable |
| 2001 | Plurality/Majority | FPTP | 1 | 17 | 17 | Not applicable |
| 1997 | Plurality/Majority | FPTP | 1 | 17 | 17 | Not applicable |
