| Date: | 27 May – 9 June 1991 |
| Edition: | 90 |
| Location: | Paris (XVIe), France |
| Venue: | Stade Roland Garros |
| Surface: | Clay |
| Category: | 61st Grand Slam (ITF) |
| Champms: |  Jim Courier |
| Champws: | Monica Seles |
| Champmd: |  John Fitzgerald /  Anders Järryd |
| Champxd: | Helena Suková / Cyril Suk |
The 1991 French Open was a tennis tournament that took place on the outdoor clay courts at the Stade Roland Garros in Paris, France. The tournament was held from 27 May until 9 June. It was the 95th staging of the French Open, and the second Grand Slam tennis event of 1991.
See main article: 1991 French Open – Men's singles. Jim Courier defeated Andre Agassi, 3–6, 6–4, 2–6, 6–1, 6–4
See main article: 1991 French Open – Women's singles. Monica Seles defeated 
Arantxa Sánchez Vicario, 6–3, 6–4
See main article: 1991 French Open – Men's doubles. John Fitzgerald / Anders Järryd defeated Rick Leach / Jim Pugh, 6–0, 7–6
See main article: 1991 French Open – Women's doubles. Gigi Fernández / Jana Novotná defeated Larisa Savchenko Neiland / Natalia Zvereva, 6–4, 6–0
See main article: 1991 French Open – Mixed doubles. Helena Suková / Cyril Suk defeated Caroline Vis / Paul Haarhuis, 3–6, 6–4, 6–1
Andrei Medvedev defeated Thomas Enqvist, 6–4, 7–6
Anna Smashnova defeated 
Inés Gorrochategui, 2–6, 7–5, 6–1
Thomas Enqvist / Magnus Martinelle defeated 
Julian Knowle / Johannes Unterberger, 6–1, 6–3
Eva Bes / Inés Gorrochategui defeated Zdeňka Málková / Eva Martincová, 6–1, 6–3