Suicide by cop is a suicide method in which a suicidal individual deliberately acts in a threatening way, with the goal of provoking a lethal response from a law enforcement officer or other armed individual, such as being shot to death.

While the phrase is colloquial ("cop" being slang for police officer) and primarily used in the United States media, it has become the most popular name for the phenomenon. Other names include death by cop, suicide-by-police, copicide and blue suicide (a reference to the blue uniforms worn by many police officers). Two more technical terms often used in research are officer- (or police-) assisted suicide and Victim-Precipitated Homicide, though these are much broader and encompass other situations beyond this subject.

The idea of committing suicide in this manner is based on trained procedures of law enforcement officers, specifically the policy on the use of deadly force. In jurisdictions where officials are readily capable of deadly force (often by being equipped with firearms), there are usually set circumstances where they will predictably use deadly force against a threat to themselves or others. This form of suicide functions by exploiting this trained reaction. The most common scenario is pointing a firearm at a police officer or an innocent person, which would reasonably provoke an officer to fire on them in defense. However, many variants exist; for example, attacking with a knife or other hand weapon, trying to run an officer or other person over with a car, or trying to trigger a (real or presumed) explosive device.