The review was launched after the death of Queen Elizabeth II in 2022 to investigate all the charities and bodies with which she, Charles and his wife Queen Camilla were associated, either as president or patron.
Elizabeth was a patron of 492 organizations, while Charles was affiliated with 441 and Camilla 100.
Following the assessment, just over 830 were retained by the King and Queen, or passed on to other members of the Royal Family.
Organizations can apply to be granted a royal patron, who in return can publicize their work and ensure their achievements are widely recognized.
Among those who will retain their royal links are the Royal British Legion, the largest charity for the armed forces, the Dogs Trust, the Jockey Club and the Wildlife Trusts, a grassroots wildlife charity.
“His Majesty has consistently demonstrated foresight, courage and leadership as he has helped communities, charities and businesses grapple with the challenges and opportunities inherent in living more sustainably and in harmony with nature,” said Craig Bennett, Chief Executive from the Wildlife Trusts.
“It is therefore a great honor that His Majesty has agreed to continue his patronage.”
The conclusions of the review will be shared with relevant organizations this week, to mark the first anniversary of Charles and Camilla's coronation, the palace said on Saturday.