The Tailor of Gloucester is a Christmas children's book written and illustrated by Beatrix Potter, privately printed by the author in 1902, and published in a trade edition by Frederick Warne & Co. in October 1903. The story is about a tailor whose work on a waistcoat is finished by the grateful mice he rescues from his cat and was based on a real world incident involving a tailor and his assistants. For years, Potter declared that of all her books it was her personal favourite.

Helen Beatrix Potter was an English writer, illustrator, natural scientist, and conservationist. She is best known for her children's books featuring animals, such as The Tale of Peter Rabbit, which was her first commercially published work in 1902. Her books, including 23 Tales, have sold more than 250 million copies. An entrepreneur, Potter was a pioneer of character merchandising. In 1903, Peter Rabbit was the first fictional character to be made into a patented stuffed toy, making him the oldest licensed character.