After the 1979 revolution, three referenda were held in Iran. This section contains data on these referenda.
Referendum on the Islamic Republic
| Year | 1979 |
| Number of Eligible Voters | 20,857,391 |
| Number of Actual Voters | 20,440,108 |
| Voter Turnout (%) | 98 |
| Outcome | Approved |
Referendum on Approving the Constitution
| Year | 1979 |
| Number of Eligible Voters | 20,857,391 |
| Number of Actual Voters | 15,690,142 |
| Voter Turnout (%) | 75.23 |
| Outcome | Approved |
Referendum on Amending the Constitution
| Year | 1989 |
| Number of Eligible Voters | 30,139,598 |
| Number of Actual Voters | 16,428,976 |
| Voter Turnout (%) | 54.51 |
| Outcome | Approved |