We examined how self-monitoring (i.e., regulating one's behaviors; Snyder, 1987) relates to Latino male achievement. In Study 1, college students (N = 413) completed self-monitoring items and reported SAT math scores. As hypothesized, self-monitoring was positively correlated with achievement for Latino male students but was unrelated to achievement for Latina and White male and female students. Study 2 used a high school sample (N = 174) and observed math performance. Analyses revealed that, again, self-monitoring was positively related to achievement for Latino male students but unrelated to achievement for Latinas. These findings demonstrate the unique effects of self-monitoring on Latino male student achievement.