This paper examines how internal migration influences educational assortative mating patterns in India using Periodic Labour Force Survey data (2020-21). We analyze the association of migrant status and type of assortative mating, that is whether migrants are more likely to engage in homogamous (similar education) or heterogamous (different education) marriages compared to non-migrants. Results show migrants are significantly more likely to form educationally heterogamous marriages, with urban-to-urban migrants particularly prone to hypogamy (marrying higher-educated partners). These findings are validated using instrumental variables including crime rates, migrant networks, and unemployment rates. Family structure and marriage pool composition emerge as key mechanisms driving educational heterogamy among migrants, suggesting migration fundamentally alters marital formation preferences away from traditional educational homogamy patterns.