Hagneck is a municipality in the Seeland administrative district in the Canton of Bern in Switzerland .

Traces of early and late Bronze Age settlements have been found in the Hagneck marshland, which is part of the Grand Marais. Construction on a hill that separated the marshes from the lake resulted in the destruction of what appeared to be a 200 m (660 ft) Roman era drainage pipe. A portion of the Roman road between Vinelz and Täuffelen is still visible near village. Scattered medieval artifacts have been found near the marsh and the remains of a medieval castle were destroyed during construction of the Hagnek channel.

Hagneck is first mentioned in 1353 as Hagneg.