In competitive sports, where the achievement of success is the very purpose of participation, it is vital that researchers and practitioners can access valid and reliable measures of achievement motivation. A range of self-report scales designed to measure motivation in sport have been developed from different theoretical perspectives. The present review aims to examine the definition and measurement of achievement motivation in sport. A systematic search of the literature was undertaken to identify relevant self-report scales. The search resulted in nine scales. The scales are reviewed following a discussion of the development of the field of achievement motivation in sport. Each scale is critiqued by describing its general properties, factor structure, evidence of reliability and validity, and potential application. The review concludes with recommendations for the measurement of achievement motivation in sport and suggestions for future development in this area.