Children from migrant and seasonal farmworker (MSFW) families are among the most educationally disadvantaged and underserved groups in the United States; however, they have received limited research attention. Using a large nationally representative sample of MSFW children in Migrant and Seasonal Head Start (MSHS) programs, this study offered national portraits of MSHS Spanish-English speaking children's language experience profiles in their homes. Preschool-aged Spanish-English dual language learners (DLLs; N = 280) were classified into two distinct profiles: (1) the Bilingual Exposure group (58.9%), comprising DLLs who had Spanish-English exposure from both adults and children, and (2) the Adult-Spanish, Child-Bilingual Exposure group (41.1%), consisting of DLLs who had Spanish-dominant exposure from adults and exposure to both languages from other children. Compared to the Adult-Spanish, Child-Bilingual Exposure group, children in the Bilingual Exposure group were more likely to come from non-immigrant families, had mothers with higher educational levels, and engaged in more home learning activities. When literacy skills were compared, the Adult-Spanish, Child-Bilingual Exposure group presented higher Spanish letter-word identification skills than the Bilingual Exposure group. No group differences were found in English letter-word identification and bilingual auditory comprehension. Our findings suggest the importance of Spanish language experience at home and call for tailoring educational approaches that consider the diverse home experiences of DLLs attending MSHS. (author abstract)