The 1980 Monte Carlo Open was a men's tennis tournament played on outdoor clay courts at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France that was part of the 1980 Volvo Grand Prix circuit. It was the 74th edition of the tournament and was held from 31 March through 6 April 1980. First-seeded Björn Borg won the singles title, his third after 1977 and 1979.
| 1980 Monte Carlo Open | |
|---|---|
| Date | 31 March – 6 April |
| Edition | 74th |
| Category | Grand Prix circuit |
| Draw | 32S / 16D |
| Prize money | $175,000 |
| Surface | Clay / outdoor |
| Location | Roquebrune-Cap-Martin, France |
| Venue | Monte Carlo Country Club |
| Champions | |
| Singles | |
 Björn Borg[1] | |
| Doubles | |
 Paolo Bertolucci / Adriano Panatta[2] | |
Finals
Singles
Björn Borg defeated 
Guillermo Vilas 6–1, 6–0, 6–2
- It was Borg's 4th singles title of the year and the 56th of his career.
Doubles
Paolo Bertolucci / Adriano Panatta defeated 
Vitas Gerulaitis / John McEnroe 6–2, 5–7, 6–3