The English and Spanish versions of the Multidimensional Health Locus of Control scales have not been psychometrically evaluated for use with Hispanic Americans. Hispanic American adults (N = 436) completed the English (n = 210) or Spanish (n = 226) Multidimensional Health Locus of Control scales. A multiple-group confirmatory factor analysis did not support equivalent four-factor structures for Spanish- and English-speaking Hispanic Americans. Follow-up exploratory factor analyses of the 24 items supported an 18-item, four-factor structure for English-speaking Hispanic Americans and a 22-item, three-factor structure for Spanish-speaking Hispanic Americans. These results suggest caution when using the Multidimensional Health Locus of Control scales with Hispanic Americans.