Uelsby

{{Infobox German location

|name = Uelsby
Ølsby

|image_photo =

|image_coa = DEU Uelsby COA.svg

|coordinates = {{coord|54|36|N|9|34|E|format=dms|display=inline,title}}

|image_plan = Uelsby in SL.PNG

|state = Schleswig-Holstein

|district = Schleswig-Flensburg

|Amt = Südangeln

|elevation = 34

|area = 10.6

|postal_code = 24860

|area_code = 04623

|licence = SL

|Gemeindeschlüssel = 01 0 59 093

|website = [http://www.amt-suedangeln.de/ www.amt-
suedangeln.de]

|mayor = Ulrich Bachler

|party =

}}

Uelsby ({{langx|da|Ølsby}}) is a municipality in the district of Schleswig-Flensburg, in Schleswig-Holstein, Germany.