A migratory child is one whose parent or guardian is a migratory agricultural worker or fisher and who has moved from one school district to another during the regular school year. The Migrant Education Program (MEP) provides supplemental support to eligible migratory children from birth through age 21. Children who are themselves migratory agricultural workers or fishers, or who are the children of such workers, face numerous education challenges. Because of their migratory lifestyle, these children may start school late, leave early, or miss long periods of schooling during the academic year. Additional challenges may include language and cultural barriers, economic hardship, and access to continuous health care. This fact sheet provides the following data on migratory children: (1) number of migratory children in the U.S. in school year (SY) 2017-18; (2) percentage of migratory children who were English learners (ELs) in SY 2017-18; (3) percentage of students who are English learners, by grade, among all students and migratory children: school year 2017-18; (4) five states with the greatest number of migratory children who are English learners: school year 2017-18; (5) five states with the highest percentage of migratory children who are English learners: school year 2017-18; and (6) percentage of migratory children, English learners, and all students who received a score of proficient or above on statewide assessments in Reading/Language Arts and Mathematics: school years 2015-16 through 2017-18.