Nieby

{{Infobox German location

|name = Nieby
Nyby

|image_photo = Windmühle Charlotte.jpg

|image_caption = The windmill "Charlotte" in Nieby

|image_coa = DEU Nieby COA.svg

|coordinates = {{coord|54|46|N|9|55|E|format=dms|display=inline,title}}

|image_plan = Nieby in SL.PNG

|state = Schleswig-Holstein

|district = Schleswig-Flensburg

|Amt = Geltinger Bucht

|elevation = 9

|area = 8.07

|postal_code = 24395

|area_code = 04643

|licence = SL

|Gemeindeschlüssel = 01 0 59 147

|website = {{URL|https://nieby.de/}}

|mayor = Dirk Hansen{{Cite web|url=https://www.amt-geltingerbucht.de/Gemeinden/Nieby|title=Nieby / Amt Geltinger Bucht|last=|first=|date=|website=|archive-url=|archive-date=|access-date=}}

}}

Nieby ({{IPA|de|ˈniːbiː|lang|De-Nieby.ogg}}, {{langx|da|Nyby}}) is a municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany.