Tanzania, United 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 | FPTP | 1 | FPTP | ||
| 2015 | Plurality/Majority | FPTP | 1 | 264 | 393 | FPTP |
| 2010 | Plurality/Majority | FPTP | 1 | 239 | 357 | FPTP |
| 2005 | Plurality/Majority | FPTP | 1 | 232 | 319 | FPTP |
| 2000 | Plurality/Majority | FPTP | 1 | 232 | 275 | TRS |
| 1995 | Plurality/Majority | FPTP | 1 | 232 | 275 | TRS |
