A crisis hotline is a phone number people can call to get immediate emergency telephone counseling, usually by trained volunteers. The first such service was founded in England in 1951 and such hotlines have existed in most major cities of the English speaking world at least since the mid-1970s. Initially set up to help those contemplating suicide, many have expanded their mandate to deal more generally with emotional crises. Similar hotlines operate to help people in other circumstances, including rape, bullying, self-harm, runaway children, human trafficking, and people who identify as LGBT or intersex. Despite crisis hotlines being common, their effectiveness in reducing suicides is not clear.

Edward Chad Varah was a British Anglican priest and social activist from England. In 1953, he founded the Samaritans, the world's first crisis hotline, to provide telephone support to those contemplating suicide.