J. K. Rowling is involved with several causes.
 Volant Charitable Trust
The trust was set up by J. K. Rowling to support two main areas: multiple sclerosis and charities on social deprivation, particularly for women and children.
 One Parent Families
Rowling, once a single parent herself, is now president of the charity One Parent Families, having already become their first Ambassador in 2000. Rowling collaborated with Sarah Brown to write a book of children's stories to aid One Parent Families.
 Comic Relief
Comic Relief was set up 25 years ago in the UK, with two main regular fundraisers: Red Nose Day and Sports Relief. J. K. Rowling wrote Quidditch Through the Ages and Fantastic Beasts and Where to Find Them for Comic Relief in 2001, and all proceeds go to the charity. £6 million was raised through the international sales of the books, helping them to reach the total of £61 million for Red Nose Day.
Comic Relief founder Richard Curtis approached Rowling to write a story saying he was sure she would not be able to but he would still love her books regardless. J. K. Rowling said that: "It was a very clever way of asking somebody to do something, though I didn't really need much persuading". She wanted to write both Quidditch and Fantastic Beasts, and being unable to decide between the two she wrote both.
 Children's High Level Group/Lumos
Information on Children's High Level Group from J K Rowling's website.
 Multiple Sclerosis
In 1990, Rowling's mother passed away in result of Multiple Sclerosis, prompting Rowling to support research for the disease. In 2003, Rowling was one of the many people in a campaign for a national standard in all sufferers of Multiple Sclerosis.
 Centre for Regenerative Medicine
In 2006, Rowling donated a large amount of money to help create a new centre at Edinburgh University, The Centre for Regenerative Medicine. Rowling later donated 10 Million pounds to the Centre which was donated towards research.
 Multiple Sclerosis Society of Great Britain
For years, Rowling was a big supporter of the Multiple Sclerosis Society of Great Britain. In the april of 2009, she withdrew from the Multiple Sclerosis Society as there were feuds between the north and south branches of the organization. She had tried fixing the problem but did not succeed.