Queen Elizabeth II was patron of 27 organisations in Australia, including hospitals, army groups and youth services.
Some have issued statements in response to Her Majesty's death.
"She dedicated her life to the service of her nation and the peoples of the Commonwealth and never shirked this great responsibility. The RSL will be forever grateful for her commitment, encouragement and support for our veterans and service personnel."
"Her outstanding example of service, encouragement and kindness was an inspiration to us all."
ANGLICAN MOTHERS UNION AUSTRALIA:
"We will always remember her intelligence and humility in making wise decisions, her charm and sense of humour, and her sincere caring and gentleness. Hers was a life born to serve God and all humanity and her legacy will live on in so many ways."
ROYAL MELBOURNE HOSPITAL:
"The Royal Melbourne Hospital extends our deepest condolences to The Royal Family on the loss of Her Majesty Queen Elizabeth II. The Queen was a much-loved patron of the RMH since taking her reign in 1952."
AUSTRALIAN RED CROSS:
"Australian Red Cross pays tribute to Her Majesty, Queen Elizabeth II, on the occasion of her death. Her Majesty was a supporter of the work of the Red Cross Red Crescent Movement across the world, including in Australia."
MELBOURNE'S ROYAL CHILDREN'S HOSPITAL:
"We will always be proud of our long association with the Queen and send our sympathies to HRH King Charles and the Royal Family, and thank them for the special relationship the RCH was privileged to enjoy during Her Majesty's reign."
MELBOURNE'S ROYAL WOMEN'S HOSPITAL:
"The Women's is a strong supporter of gender equity, so we are grateful for the Queen's example of female leadership which was admired by many people."
AUSTRALIAN PHYSIOTHERAPY ASSOCIATION:
"We pay our respects to the decades of service she gave to the Commonwealth. We admire the grace and dignity with which she led her life of duty."
RACING VICTORIA (FOR THE AUSTRALIAN RACING MUSEUM):
"Racing Victoria extends its heartfelt condolences following the sad news of the passing of Queen Elizabeth II. An avid racegoer, breeder and owner, Queen Elizabeth's love of the horse and thoroughbred racing was an unmistakable characteristic of her reign."
AUSTRALIAN MEDICAL ASSOCIATION:
"The AMA pays tribute to the long reign of Queen Elizabeth II and acknowledges the many intersections that the medical profession in Australia has with organisations enjoying royal patronage. The AMA acknowledges the Queen's selfless service and expresses our condolences to her family."