Wittenseeⓘ was an Amt ("collective municipality") in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany.

It was named after the lake Wittensee, which is situated in the Amt.

The village Groß Wittensee was the seat of the Amt.

[1] The Amt Wittensee consisted of the following municipalities:

This Rendsburg-Eckernförde location article is a stub.