A criminal code (or penal code) is a document which compiles all, or a significant amount of, a particular jurisdiction's criminal law. Typically a criminal code will contain offences which are recognised in the jurisdiction, penalties which might be imposed for these offences and some general provisions (such as definitions and prohibitions on retroactive prosecution).^[1]

Criminal codes are relatively common in civil law jurisdictions, which tend to build legal systems around codes and principles which are relatively abstract and apply them on a case by case basis. Conversely they are rare in common law jurisdictions.

The proposed introduction of a criminal code in England and Wales was a significant project of the Law Commission from 1968 to 2008. Due to the strong tradition of precedent in the jurisdiction and consequently the large number of binding judgements and ambiguous 'common law offences', as well as the often inconsistent nature of English law - the creation of a satisfactory code became very difficult. The project was officially abandoned in 2008 although as of 2009 it has been revived.^[2]

In the United States a Model Penal Code exists which is not itself law but which provides the basis for the criminal law of many states. Individual states often choose to make use of criminal codes which are often based, to a varying extent on the model code.^[3] Title 18 of the United States Code is the criminal code for federal crimes.^[4] However, Title 18 does not contain many of the general provisions concerning criminal law that are found in the criminal codes of many so-called "civil law" countries.

Criminal codes are generally supported for their introduction of consistency to legal systems and for making the criminal law more accessible to laypeople.^[5] A code may help avoid a chilling effect where legislation and case law appears to be either inaccessible or beyond comprehension to non-lawyers. Alternatively critics have argued that codes are too rigid and that they fail to provide enough flexibility for the law to be effective.

The term "penal code" (code pénal) derives from the French Penal Code of 1791.

• Australian criminal codes (The states of New South Wales, Victoria and South Australia do not use codes; the Commonwealth is in transition.)
• Criminal Code of Belarus
• Penal code of Brazil
• British Virgin Islands Criminal Code
• Criminal Code (Canada)
• Criminal Code of Chile
• Criminal Code of the Czech Republic (2009)
• Danish Penal Code
• English Criminal Code, a draft has existed since 1989 but, though debated since 1818, has never been enacted.
• Criminal Code of Finland
• French Penal Code
• German Criminal Code
• Hungarian Penal Code in English, status of 18 August 2005 ; Operative Hungarian Penal Code
• Icelandic Penal Code
• Indian Penal Code^[6] and Code of Criminal Procedure^[7]
• Iranian Criminal Code
• Iraqi Penal Code
• Italian Penal Code
• Penal Code of Japan
• Penal Code of Macau
• Criminal Code of Malta, enacted in 1854.
• Mexican Penal Code, enacted on August 14th, 1931.
• General Code of Nepal
• New Zealand Crimes Act 1961
• Pakistan Penal Code
• Revised Penal Code of the Philippines
• Polish Penal Code
• Penal Code of Romania
• Criminal Code of Russia
• Penal Code of Sri Lanka
• Penal Code (Singapore)
• Turkish Penal Code (also see its articles 301 and 312)
• Criminal Code of Ukraine
• Title 18 of the United States Code
• Model Penal Code by the American Law Institute

Penal Codes of some member countries of the Organization of American States may be found in the public portion of the OAS website, through links from http://www.oas.org/juridico/MLA/en/index.html. However, the extent to which codes are kept current is unclear, and not all national codes are available. Some countries include special criminal statutes not in their Codes, including statutes on terrorism, drug trafficking and public corruption.

• Codification