This paper estimates the effect of migrating permanently as a child from a rural area to an urban area; focusing on long-term educational attainment in Indonesia. We conduct a household survey specifically tailored to collect data on urban-rural migrants in four major migrant destination cities in Indonesia, and merge the data with a nationally representative survey to create a dataset that contains migrants in urban areas and non-migrants in rural areas who were born in the same rural districts. We find that individuals who migrated to the city as children attained three more years of education, compared to observably similar individuals who remained in rural areas. We find no gender differences in the benefit of childhood migration. Finally, age at migration and the size of network in the city do not significantly affect the educational attainment of childhood migrants.