Yes, zina is a major sin in Islam. According to the Quran, Zina, alcohol, and gambling, are major sins. Zina is the most serious sin in Islam compared to other sins. I am explaining more about why Zina is a big sin reasons and references for Is zina a major sin.

Three Reasons for Zina is Major Sin

1. Zina is against Allah Command.
2. Zina is against personal dignity and honor
3. Zina has a very negative social impact on family relatives and society.

Reference from the Quran and Hadith

Quran: These are two main references from the Quran about the Zina. First, Al-Isra 17:32 and, second Al-Furqan 25:68.

Hadith: No adulterer is a believer at the time when he is committing adultery, no thief is a believer at the time when he is stealing, no drinker of alchol is a believer at the time when he is drinking. (Narrated by Al-Bukhari and Muslim).

Islamic Legal Consequences

In Islamic law, the punishment for Zina is the most severe compared to other sins. Islamic law, defines two different punishments for a single person are different and for a married person are different. The punishment for a married person who is committing Zina should be stoned to death, while for an unmarried person, it is 100 lashes and exile for one year.