"The Adventure of Charles Augustus Milverton" is one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle. It is one of 13 stories in the cycle collected as The Return of Sherlock Holmes and was published in 1904.

Holmes is hired by the débutante Lady Eva Blackwell to retrieve compromising letters from a blackmailer: Milverton, who causes Holmes more revulsion than any of the 50-odd murderers in his career.