Patterns of who migrates, where and for how long are strongly gendered. Against this backdrop, environmental change is altering the context in which migration takes place. In this chapter we outline some of the theory on migration and gender, on how environmental change affects migration, and the gendered effects of environmental migration. We illustrate our arguments using primary data from a sex-disaggregated survey of 1356 households in the Ganges-Brahmaputra-Meghna delta, from which we conclude that migration flows and consequences exhibit gender differences and that environmental change plays an integral role. We then conclude with some insights into future environmental change and its potential effects on migration patterns in Bangladesh.