The Swift Singers are holding a 25th anniversary concert at William de Ferrers Centre, South Woodham Ferrers at 7.30pm on Saturday.
Guests include Chelmsford City Council's mayor and the deputy mayor of South Woodham Ferrers Town Council.
The choir has entertained audiences locally and further afield in France, Germany, Ireland, Wales, Yorkshire and The Isle of Man Music Festival, where it won first place in its category.
Members have also raised thousands of pounds raised for numerous charities over the years.
Farleigh Hospice will receive a cheque for £1,000 at Saturday's concert.