Schlei-Ostsee is an Amt ("collective municipality") in the destrict o Rendsburg-Eckernförde, in Schleswig-Holstein, Germany. Its seat is in Eckernförde, itsel no pairt o the Amt. It wis formit on 1 Januar 2008 frae the umwhile Ämter Schlei, Schwansen an Windeby.

The Amt Schlei-Ostsee consists o the follaein municipalities:

  1. Altenhof
  2. Barkelsby
  3. Brodersby
  4. Damp
  5. Dörphof
  6. Fleckeby
  7. Gammelby
  8. Goosefeld
  9. Güby
  10. Holzdorf
  1. Hummelfeld
  2. Karby
  3. Kosel
  4. Loose
  5. Rieseby
  6. Thumby
  7. Waabs
  8. Windeby
  9. Winnemark

Coordinates: 54°34′59″N 10°00′00″E / 54.583°N 10.000°E / 54.583; 10.000