| 2021 in K-1 | |
|---|---|
| Information | |
| First date | March 28, 2021 |
| Last date | December 4, 2021 |
| Events | |
| Total events | 7 |
| Fights | |
| Total fights | 116 |
| Title fights | 8 |
The year 2021 is the 28th year in the history of the K-1, a Japanese kickboxing promotion. The year started with K-1: K’Festa 4.