Adultery is still a criminal offense in a minority of countries, mainly in parts of the Middle East, Africa, and Asia, while most of Europe, the Americas, and many Asian states have decriminalized it and treat it only as a civil or marital issue.

Key idea: “Where is adultery illegal?”

In many places, adultery is not just a moral or marital issue but a crime that can lead to fines, prison, corporal punishment, or even death, depending on local law and how it is enforced. These laws often sit at the intersection of criminal law, religion, and gender norms, and they are changing over time as courts and parliaments reconsider them.

Regions where adultery is criminalized

Across the world, criminal adultery laws most commonly appear in:

  • States applying strict versions of Islamic (Sharia) law, where adultery is treated as part of the broader offence of zina (sex outside marriage).
  • A few non‑Islamic countries that retained older morality codes and still criminalize affairs under their penal codes.

Examples often cited in recent overviews include:

  • Saudi Arabia, Pakistan, Somalia, Brunei – adultery is treated as a serious offence under religiously‑inspired criminal codes, with possible penalties ranging from imprisonment and flogging to, in the most severe cases on the books, death (often by stoning), though such extreme penalties require very high evidentiary standards and are not uniformly applied.
  • United Arab Emirates (UAE) – adultery can lead to jail and, for foreigners, deportation; prosecutions have occurred when people are reported, examined after pregnancy outside marriage, or found in “compromising” situations.
  • Indonesia (especially Aceh) – nationally, Indonesia has recently moved to criminalize sex outside marriage, and Aceh province enforces local Sharia rules with punishments such as public caning for adultery.
  • Philippines, some African states (e.g., Uganda, Republic of the Congo, Somalia) – adultery or related offences remain in the penal code and can carry several months of imprisonment or more; in some systems, the rules are harsher for women than for men.
  • Other jurisdictions – various lists also mention places like Nepal or Taiwan (historically) where adultery offences have existed, though some of these have been repealed in very recent reforms.

Because laws change, anyone worried about legal risk should check the current criminal code of the specific country or region, not just a global list, before relying on older information.

Places that have decriminalized adultery

Over the last few decades, many countries have abolished adultery offences, viewing them as violations of privacy, equality, or modern human‑rights norms. Common patterns include:

  • Europe and much of the Americas – most states now treat adultery only as a ground for divorce, custody disputes, or damages, not as a crime.
  • High‑profile recent examples :
    • India – its Supreme Court struck down the adultery offence in 2018, holding that the old law was discriminatory and incompatible with constitutional rights.
* **South Korea** – abolished its adultery crime in 2015 after decades of controversy.

* Other countries like **France, Germany, Japan, Australia, New Zealand, and several Caribbean and African states** are often cited as having repealed older adultery crimes in recent decades.

Even where adultery is no longer criminal, it can still affect:

  • Divorce outcomes, especially in fault‑based systems.
  • Child custody and property division, depending on local family law.
  • Immigration, employment, or religious status in some communities.

How harsh can penalties be?

Where adultery is illegal, penalties vary widely:

  • Fines or short jail terms – in some countries, punishment may be a few months in prison plus a fine.
  • Longer imprisonment or corporal punishment – others allow multiple years in prison, flogging, or public caning, particularly under strict religious codes.
  • Death penalty on the books – a small number of states formally allow execution (usually stoning) for aggravated adultery under certain interpretations of religious law, although documented enforcement is rare and highly controversial.

In practice, enforcement is often uneven: cases may depend on family complaints, local politics, or evidentiary rules that can disadvantage women or marginalized groups.

Why this is a “trending topic”

Discussions about where adultery is illegal keep resurfacing in news and forums because:

  • Courts and parliaments continue to repeal or reconsider adultery laws, especially where they are seen as discriminatory against women.
  • High‑profile prosecutions, especially involving foreigners in tourist or expat destinations, periodically make headlines and spark debate about consent, privacy, and cultural clashes.
  • Online communities regularly argue whether adultery should be a crime at all, with some users calling for harsh penalties and others warning about state overreach into private relationships.

“An affair can destroy trust and families—but in some countries it can also destroy your legal freedom, which is why people keep asking where adultery is still a crime.”

TL;DR: Adultery is illegal—and sometimes harshly punished—in a limited but significant group of mainly Middle Eastern, African, and Asian countries, especially where strict religious laws are part of the criminal code, while the broad global trend has been to decriminalize it and treat it strictly as a private and family‑law matter.

Information gathered from public forums or data available on the internet and portrayed here.