Schlei-Ostsee is an Amt ("collective municipality") in the district of Rendsburg-Eckernförde, in Schleswig-Holstein, Germany. Its seat is in Eckernförde, itself not part of the Amt. It was formed on 1 January 2008 from the former Ämter Schlei, Schwansen and Windeby. The Amt Schlei-Ostsee consists of the following municipalities: - Altenhof
- Barkelsby
- Brodersby
- Damp
- Dörphof
- Fleckeby
- Gammelby
- Goosefeld
- Güby
- Holzdorf
| - Hummelfeld
- Karby
- Kosel
- Loose
- Rieseby
- Thumby
- Waabs
- Windeby
- Winnemark
| {{Ämter (Schleswig-Holstein)}}{{RendsburgEckernförde-geo-stub}}{{coord|54.583|N|10.000|E|display=title|source:dewiki}} 1 : Ämter in Schleswig-Holstein |