Didymóteicho (, ) is a town located on the eastern edge of the Evros regional unit of East Macedonia and Thrace, in northeastern Greece. It is the seat of the municipality of the same name. The town (pop. 9,263 in 2011) sits on a plain and located south east of Svilengrad, south of Edirne, Turkey and Orestiada, west of Uzunköprü, Turkey, about 20 km north of Soufli and about 90 km north of Alexandroupoli. The municipality of Didymóteicho has a land area of 569.5 km² and a population of 19,493 inhabitants.