Gun control is any law, policy, practice, or proposal designed to restrict or limit the possession, production, importation, shipment, sale, and/or use of guns or other firearms by private citizens. Most commonly the guns in question are personal firearms, typically handguns and long guns.

Gun control laws and policies vary greatly around the world with some countries, such as the United Kingdom, having very strict limits on gun possession and others, such as the United States, having relatively modest limits. In some countries, the topic remains a source of intense debate with proponents generally arguing the dangers of widespread gun ownership, and opponents generally arguing individual rights of self-protection as well as individual liberties in general.

Several studies have examined the correlations between rates of gun ownership and gun-related, as well as overall, homicide and suicide rates within various jurisdictions around the world. Martin Killias, in a 1993 study covering 21 countries, found that there were significant correlations between gun ownership and gun-related suicide and homicide rates. There was also a significant though lesser correlation between gun ownership and total homicide rates. A later study published by Killias in 2001 reported that, while there was a strong correlation between gun-related homicide of women and gun-related assaults against women, this was not the case for similar crimes against men and that "interestingly, no significant correlations with total suicide or homicide rates were found, leaving open the question of possible substitution effects." This study indicates correlation, but not causality. This could mean that the easier the access to guns leads to more violence. It could also mean that larger amounts of violence lead to a higher level of gun ownership for self defense, or any other independent cause.