| Country: | Paraguay |
| Previous Election: | 1989 |
| Next Election: | 1993 |
| Election Date: | 1 December 1991 |
| First Election: | yes |
| Seats For Election: | All 198 seats in the Constitutional Assembly |
| Majority Seats: | 100 |
| Noleader: | yes |
| Party1: | Colorado Party |
| Percentage1: | 55.1 |
| Seats1: | 122 |
| Party2: | Authentic Radical Liberal Party |
| Percentage2: | 27.0 |
| Seats2: | 55 |
| Party3: | Constitution for All |
| Colour3: |
|
| Percentage3: | 11.0 |
| Seats3: | 19 |
| Party4: | Revolutionary Febrerista Party |
| Colour4: |
|
| Percentage4: | 1.2 |
| Seats4: | 1 |
| Party5: | Christian Democratic Party |
| Colour5: |
|
| Percentage5: | 0.9 |
| Seats5: | 1 |
Constitutional Assembly elections were held in Paraguay on 1 December 1991.[1] The result was a victory for the Colorado Party, which won 122 of the 198 seats. Voter turnout was 51.7%.[2]
Following the elections, a new constitution was promulgated in 1992. It reintroduced the position of Vice President and allowed for the President to be elected by a plurality of the vote.[3] It also limited the President to a single five-year term, with no possibility of re-election even if the incumbent had only served a partial term. This provision meant that incumbent Andrés Rodríguez would have had to leave office in 1993 even without his promise to not run for a full term.[4]
The 198 members of the Constituent Assembly were elected by closed list proportional representation with seats allocated using the D'Hondt method at two levels: