The local proclamation of King Charles III, will be read out by the Mayor of Bradford on Avon, Cllr Katie Vigar, at 1.15pm on Sunday, 11 September.
All residents and local people are invited to join the event in Westbury Garden.
Residents are reminded that the book of condolence is held in the Tourist Information Centre.
It will be open from 10.30am to 4pm throughout the period of national mourning.
There is also an online book of condolence.