"The Adventure of the Red Circle" is one of the 56 Sherlock Holmes short stories written by Arthur Conan Doyle. It is included in the anthology His Last Bow. It was first published in the UK in The Strand Magazine in March-April 1911, and in the United States in the US edition of the Strand in April-May 1911. The story was published with three illustrations by H. M. Brock and one by Joseph Simpson in The Strand Magazine, and with the same illustrations in the US edition of the Strand. It was included in the short story collection His Last Bow, which was published in the UK and the US in October 1917.