The Columbia Lighthouse Project’s mission is to light the way to ending suicide. The Project was formed under the auspices of Columbia University to disseminate the Columbia-Suicide Severity Rating Scale (C-SSRS), optimize the scale’s impact through support for its users, and continue to build the science behind the scale. The C-SSRS supports suicide risk assessment through a series of simple, plain-language questions that anyone can ask. The answers help users identify whether someone is at risk for suicide, assess the severity and immediacy of that risk, and gauge the level of support that the person needs. Assessment questionnaires are available for families and friends or healthcare providers and other professionals.