James William Humphreys (7 January 1930 – September 2003) was an English businessman and criminal who owned a chain of adult book shops and strip clubs in London in the 1960s and 1970s. He was able to run his business through the payment of large bribes to serving police officers, particularly those from the Obscene Publications Branch (OPB) of the Metropolitan Police. His diaries—which detailed meetings he had held with police officers, the venues of the meetings and the amounts of bribes paid—provided evidence for the investigation by anti-corruption officers of the Metropolitan Police.