Violence risk assessment is the process of identifying the level of risk for future violence posed by offenders, forensic patients, and civil psychiatric patients. In each such context, whether persons are detained or released into the community is a decision governed by law. The field of violence risk assessment has witnessed tremendous growth over the past several decades. With few exceptions, its use in numerous legal settings has been upheld by courts, and in some cases professionals have positive duties to conduct risk assessments and protect potential victims. After early research findings suggesting very poor performance of clinicians in predicting violence, a great deal of research has focused on improving risk assessment. Several hundred studies have now been conducted on structured approaches to risk assessment (e.g., actuarial prediction, structured professional judgment). Similarly, a great amount of scientific attention has been paid to identifying empirically supported violence risk factors. More recently, scholars have been focusing on identifying so-called dynamic risk factors, or those that are changeable and of most relevance to intervention. Current themes in risk assessment include focusing on how risk assessment can inform risk management and risk reduction and how best to integrate risk assessment technology into actual practice.