The service will be attended by Her Majesty The Queen and His Royal Highness The Duke of Edinburgh.
It will be an opportunity to honour the members of the UK forces and civil servants who served in Iraq and to remember those who gave their lives over the six-year operation.
Attendance at the service, which will take place at 1100hrs, will be by invitation only and the majority of the congregation will consist of serving and ex-serving veterans of the conflict, along with their commanders, the injured, and families of those who died.
Defence Secretary Bob Ainsworth said:
"This service will provide an opportunity to remember the enormous contribution made by some 120,000 members of the UK Armed Forces and their civilian colleagues who have served in Iraq over six years.
"In particular it will be a time to remember the ultimate sacrifice made by those who died and who contributed to the greater peace and stability that exists in Iraq today."