Peasmarsh is a village and civil parish in the Rother district, in the county of East Sussex in England. It is located on the A268 road between Rye and Beckley, some 3 miles (4.8 km) north-west of Rye.
The village church, dedicated to St Peter and Paul, lies about one mile (1.6 km) from the village; it is thought the village centre was moved after the Black Death plague. There are three public houses and a motel in close proximity to the village; and a country house hotel with a leisure centre. The village is also home to an independent supermarket, although the proprietors choose not to open their store on Sundays. Peasmarsh Place, now a residential care home, is to the south-east of the village.