Saeftinghe was drained in the 13th century under the management of the abbey of Ter Doest. Willem van Saeftinghe was one of the best known occupants of the abbey and gave his name to the stretch of land claimed from the sea. Up to 1570, the land was very fertile polder. Agriculture, peat burning and trade turned Saeftinghe into one of the most prosperous places in the region. There were several additional settlements nearby: Namen, Sint-Laureins, Stampaert, Weele (Sint-Marie), Sint-Laureijns and Casuwele.
The settlements were mostly small villages with just a few houses and huts, but there was also Saeftinghe Castle, built in 1279. Today all is buried beneath several layers of clay and sand due to several floods over the years. Large bricks were found at several places inland. Those bricks were probably remainders of the abbey used by the villagers to build their houses when the abbey was destroyed due to several floods. Today some of those bricks can be seen in the nearby Visitors Center.
Most of the land around the town was lost in the All Saint's flood of 1570 (the Allerheiligenvloed). Four years later the drowned land reached into what is now Belgium. Only Saeftinghe and some surrounding land managed to remain dry.
In 1584, during the Eighty Years' War, Dutch soldiers found themselves forced to destroy the last intact dike and Saeftinghe sank into the waters of the Scheldt. Attempts to reclaim the area were made throughout history; the most serious project taking place in 1907, but even then only the Hertogin Hedwigepolder was conquered from the sea. Nowadays a hamlet is located within the reclaimed portions of land, called Emmadorp [nl].
Saaftinge itself has never been retrieved.
In 1970, all of the area was incorporated into the municipality of Hulst, when Graauw en Langendam [nl] and Clinge ceased to exist.
Within the historical municipal limits, Saaftinge today has a population of 55. The flag consists of a blue lion rampant on a white field. The lion originates from the personal shield of Willem van Saeftinghe.[2]