Osterby
Osterby is the name of the following places:
- Osterby community near Eckernförde, see Osterby (Rendsburg-Eckernförde district) in Schleswig-Holstein
- Osterby community near Flensburg, see Osterby (Schleswig-Flensburg district) in Schleswig-Holstein
- Osterby, village in the Sønderborg municipality on the Kegnæs peninsula, North Schleswig, Denmark