2021 Council of the Isles of Scilly election

Elections to the Council of the Isles of Scilly took place on 6 May 2021, alongside other United Kingdom local elections. 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.

Ward results
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.

There was only one nomination for this election, so Andrew Crispin Frazer was declared elected on 28 May 2021.