| Election Name: | 2021 Knowsley Metropolitan Borough Council election |
| Country: | Merseyside |
| Flag Image: | Coat of arms of Knowsley Metropolitan Borough Council.png |
| Type: | parliamentary |
| Previous Election: | 2019 Knowsley Metropolitan Borough Council election |
| Previous Year: | 2019 |
| Next Election: | 2022 Knowsley Metropolitan Borough Council election |
| Next Year: | 2022 |
The 2021 Knowsley Metropolitan Borough Council election took place on 6 May 2021 to elect members of Knowsley Metropolitan Borough Council in England. This was on the same day as other local elections.[1] One-third of the seats were up for election.