The assessment of intimate partner violence (IPV) by mental health, medical, and criminal justice practitioners occurs routinely. The validity of the assessment instrument they use impacts practitioners' ability to judge ongoing risk, establish the type of IPV occurring, protect potential victims, and intervene effectively. Yet, there is no known compendium of existing assessment measures. The purpose of this article is threefold: (1) to present a systematic review of measures used to identify or predict IPV, (2) to determine which of these measures have psychometric evidence to support their use, and (3) to determine whether any existing measure is capable of differentiating between situational couple violence and intimate terrorism. A systematic search was conducted using PsycINFO, PsycARTICLES, PubMed, and MEDLINE. Studies on the reliability or validity of specific measures of IPV were included, regardless of format, length, discipline, or type of IPV assessed. A total of 222 studies, on the psychometric properties of 87 unique measures, met our a priori criteria and were included in the review. We described the reliability and validity of the 87 measures. We rated the measures based on the Consensus-based Standards for the Selection of Health Measurement Instruments-revised criteria and other established validity criteria, which allowed us to generate a list of recommended measures. We also discussed measures designed to differentiate IPV types. We conclude by describing the strengths and weaknesses of existing measures and by suggesting new avenues for researchers to enhance the assessment of IPV.