| Date: | 26 September 1999 |
| Country: | Tajikistan |
| Yes: | 1,860,804 |
| No: | 609,787 |
| Invalid: | 121,314 |
| Electorate: | 2,800,947 |
A constitutional referendum was held in Tajikistan on 26 September 1999.[1] The changes included legalising religious political parties, introducing a bicameral parliament, and lengthening the president's term from five to seven years. They were approved by 75% of voters, with a turnout of 93%.[2]