| Country: | Iceland |
| Previous Election: | 1987 |
| Election Date: | 20 April 1991 |
| Next Election: | 1995 |
| Seats For Election: | All 42 seats in the Lower House and 21 seats in the Upper House of Althing |
| Turnout: | 87.62% |
| Heading1: | Upper House |
| Heading7: | Lower House |
| Leader1: | Davíð Oddsson |
| Leader7: | Davíð Oddsson |
| Party1: | Independence Party (Iceland) |
| Party7: | Independence Party (Iceland) |
| Last Election1: | 6 |
| Last Election7: | 12 |
| Seats1: | 9 |
| Seats7: | 17 |
| Percentage1: | 38.56 |
| Percentage7: | 38.56 |
| Leader8: | Steingrímur Hermannsson |
| Party2: | Progressive Party (Iceland) |
| Party8: | Progressive Party (Iceland) |
| Last Election2: | 5 |
| Last Election8: | 8 |
| Seats2: | 4 |
| Seats8: | 9 |
| Percentage2: | 18.93 |
| Percentage8: | 18.93 |
| Leader3: | Jón Baldvin Hannibalsson |
| Leader9: | Jón Baldvin Hannibalsson |
| Party3: | Social Democratic Party (Iceland) |
| Party9: | Social Democratic Party (Iceland) |
| Last Election3: | 3 |
| Last Election9: | 7 |
| Seats3: | 3 |
| Seats9: | 7 |
| Percentage3: | 15.50 |
| Percentage9: | 15.50 |
| Leader4: | Ólafur Ragnar Grímsson |
| Leader10: | Ólafur Ragnar Grímsson |
| Party4: | People's Alliance (Iceland) |
| Party10: | People's Alliance (Iceland) |
| Last Election4: | 3 |
| Last Election10: | 5 |
| Seats4: | 3 |
| Seats10: | 6 |
| Percentage4: | 14.39 |
| Percentage10: | 14.39 |
| Party6: | Women's List |
| Party12: | Women's List |
| Last Election6: | 2 |
| Last Election12: | 4 |
| Seats6: | 2 |
| Seats12: | 3 |
| Percentage6: | 8.28 |
| Percentage12: | 8.28 |
| Prime Minister | |
| Before Election: | Steingrímur Hermannsson |
| Before Party: | Progressive Party (Iceland) |
| After Party: | Independence Party (Iceland) |
Parliamentary elections were held in Iceland on 20 April 1991.[1] The Independence Party remained the largest party in the Lower House of the Althing, winning 17 of the 42 seats.[2]
Following constitutional changes made in 1991, the Upper and Lower Houses of the Althing were abolished, and all members became part of a unicameral parliament.[2]