Critical consciousness of inequity and racism may be a significant asset for Latina/Latino youth’s educational persistence and vocational development. This study describes the development and testing of a new measure of critical consciousness in two samples of Latina/Latino adolescents. Study 1 presents an exploratory factor analysis of the critical consciousness items in a sample of 476 Latina/Latino students from 65 high schools. Study 2 presents confirmatory factor analyses of the items in a separate sample of Latina/Latino students from 74 high schools for the English (n = 680) and Spanish (n = 190) versions of the measure. A two-factor structure (Critical Agency and Critical Behavior) provided a good fit to the data. Relationships between Critical Agency, Critical Behavior, and variables such as postsecondary education plans, vocational outcome expectations, engagement (in school, extracurricular activities, Spanish language, and helping others), and thoughts of dropping out provide initial evidence of construct validity. Strengths, limitations, and future directions are discussed.