This chapter presents a description of the triage systems. These systems include Simple Triage and Rapid Treatment (START), Homebush Triage Standard, CareFlight Triage, Triage Sieve, the Sacco Triage Method, the CESIRA Protocol, MASS Triage, and Military/NATO Triage. The chapter provides a brief discussion of the Sort, Assess, Lifesaving measures, Treat/Transport (SALT) system. SALT begins with a global sorting of patients to prioritize them for individual assessment. The chapter discusses the secondary triage systems SAVE and Triage Sort, as well as the pediatric specific systems, JumpSTART and the Pediatric Triage Tape. There are two categories of outcomes that could be used in assessing how triage affects patient outcome: patient-based scoring systems and resource based systems. Specific attention to chemical, biological, and radiological/nuclear (CBRN) events is a critical component of state of the art triage systems and must be considered when choosing a triage methodology.