| 2020 in ONE Championship | |
|---|---|
 | |
| Information | |
| First date | January 10, 2020 |
| Last date | December 25, 2020 |
| Events | |
| Total events | 26 |
| One Championship | 20 |
| Warrior Series | 1 |
| Hero Series | 2 |
| Road To Events | 3 |
| Fights | |
| Total fights | 189 |
| Title fights | 17 |
The year 2020 was the 10th year in the history of the ONE Championship, a mixed martial arts, kickboxing and muay thai promotion based in Singapore.