Misprision of felony is a form of misprision, and an offence under the common law of England that is no longer active in many common law countries. Where it was or is active, it is classified as a misdemeanor. It consists of failing to report knowledge of a felony to the appropriate authorities. Exceptions were made for close family members of the felon and where the disclosure would tend to incriminate him of that offence or another.

With the development of the modern law, this crime has been discarded in many jurisdictions, and is generally only applied against persons placed in a special position of authority or responsibility. In this case, the offence of misfeasance in public office or malfeasance in public office may be considered instead. For example, corrections officers who stand idly by while drug trafficking occurs within the prison may be prosecuted for this crime.

It has been abolished in:

• England, Wales and Scotland, as part of the criminal law reforms that abolished the distinction between misdemeanor and felony—Criminal Law Act 1967 (c. 58), section 1
• Northern Ireland, with the Criminal Law Act (Northern Ireland) 1967—(c. 18) (N.I.), section 1
• Ireland, with the Criminal Law Act 1997—(No. 14), section 3
• New South Wales, Australia, with the Crimes Act 1900—section 341

In some cases, misprision has been replaced by a more tightly-defined statutory offence. For example, in England and Wales, the 1967 Act states that a person who has information which might lead to the prosecution of an arrestable offence—and who agrees to accept consideration in exchange for not disclosing it—is liable on conviction on indictment to imprisonment.