Theener is a village in the region of East Frisia, Lower Saxony, Germany.

It is an Ortsteil of the municipality of Hagermarsch, part of the municipal association (Samtgemeinde) of Hage.

It is a dispersed settlement to the south of Hilgenriedersiel.

Historically, the village was first recorded in 1787 as Thener and has been officially registered under its current name since 1818.

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