United States

Emergency: 911
National Domestic Violence Hotline: 1- 800-799-7233
National Suicide Prevention Lifeline: 1-800-273-TALK (8255)
National Hopeline Network: 1-800-SUICIDE (800-784-2433)
Crisis Text Line: Text "DESERVE" TO 741-741
Lifeline Crisis Chat (Online live messaging):

https://suicidepreventionlifeline.org/chat/
Self-Harm Hotline: 1-800-DONT CUT (1-800-366-8288)
Family Violence Helpline: 1-800-996-6228
Planned Parenthood Hotline: 1-800-230-PLAN (7526) 
American Association of Poison Control Centers: 1-800-222-1222
National Council on Alcoholism & Drug Dependency Hopeline:

1-800-622-2255
National Crisis Line - Anorexia and Bulimia: 1-800-233-4357
GLBT Hotline: 1-888-843-4564
TREVOR Crisis Hotline: 1-866-488-7386
AIDS Crisis Line: 1-800-221-7044
Veterans Crisis Line: https://www.veteranscrisisline.net
Trans Lifeline: https://www.translifeline.org - 877-565-8860
Suicide Prevention Wiki: http://suicideprevention.wikia.com