The social identity theory of leadership has potential application to sport coaching research but lacks a usable measure. We administered a pool of 51 items to 271 sport science students aiming to produce measures of coach prototypicality and team identity. Principal component analysis (PCA) produced a 10-item Coach Social Identity Scale (CSIS), and a 15-item Team Social Identity Scale (TSIS). The study produced initial evidence of reliability and validity for both the CSIS and the TSIS, providing a potentially useful set of measures with which to explore the role of social identity in coaching.