This article reports the development and psychometric properties of the Feminist Supervision Scale (FSS), a new scale designed to assess feminist supervision practices in clinical supervision. This 32-item measure was developed using a rational/theoretical approach of test construction and includes four subscales: (a) collaborative relationships, (b) power analysis, (c) diversity and social context, and (d) feminist advocacy and activism. Reliability estimates for the FSS full scale and subscales were acceptable. Structural validity of the FSS was supported by exploratory and confirmatory factor analyses. Convergent validity was supported by positive correlations between the FSS and self-identification as a feminist supervisor, liberal gender role attitudes, and use of feminist therapy behaviors. Discriminant validity was supported by nonsignificant correlations between the FSS and social desirability and length of time as a supervisor, and by demonstrating that the FSS was related but conceptually distinct from both multicultural competence and perceived supervisory working alliance. (Contains 3 tables.)