Wiesederfehn is a small village and district (Stadtteil) of the East Frisian town of Wiesmoor, in Lower Saxony.

It is located northeast of the town, along the Bundesstraße 436.

Wiesederfehn lends its name to the more northern village of Wiesede.

It is an East Frisian moor colony, founded in 1796.

On 1 July 1972, the previously independent community became part of Wiesmoor.