| Election Name: | 2021 Council of the Isles of Scilly election |
| Country: | Isles of Scilly |
| Type: | Parliamentary |
| Ongoing: | yes |
| Party Colour: | yes |
| Previous Election: | 2017 Council of the Isles of Scilly election |
| Previous Year: | 2017 |
| Next Year: | 2025 |
| Seats For Election: | All 16 seats to the Council of the Isles of Scilly |
| Election Date: | May 2021 |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Nonpartisan |
| After Election: | Nonpartisan |
Elections to the Council of the Isles of Scilly took place on 6 May 2021, alongside other United Kingdom local elections.[1] All 16 seats on the council were up for election. There are 12 councillors for St Mary's and 1 each of the other inhabited isles of Bryher, St Agnes, St Martin's and Tresco.
No one was nominated for Bryher. Consequently, the Returning Officer was required to order an election to fill the vacancy on a day of their choice before Friday 25 June. It was announced that a notice of election would not be issued until after the May elections had passed.[2]
There was only one nomination for this election, so Andrew Crispin Frazer was declared elected on 28 May 2021.[3]