While research consistently supports the negative impact of thinness pressures on body image, this work has primarily utilized White samples in the United States, limiting generalizability to other ethnicities. Further, limited research has examined ethnic differences in thinness pressures from distinct sociocultural influences. This study examined distinct sources of thinness pressures in 598 White, 135 Black, and 131 Hispanic college women in the United States. Mean levels of thinness pressures significantly differed across ethnicity, with Black women generally reporting the lowest levels of each pressure. Additionally, distinct sources of thinness pressures were more highly related to negative outcomes within ethnic groups. For White women, each source was salient for disordered eating. For Black women, family pressure was particularly salient for appearance evaluation. For Hispanic women, family pressure was particularly salient for disordered eating and appearance evaluation. Findings suggest possible ethnic differences in the relative salience of some pressures over others