Sostis

{{Infobox Greek Dimos

|name = Sostis

|name_local = Σώστης

|type = municipal unit

|image_map = DE Sostou.svg

|map_caption = Location within the regional unit

|periph = East Macedonia and Thrace

|periphunit = Rhodope

|municipality = Iasmos

|pop_municunit = 5521

|pop_community = 632

|population_as_of = 2021

|area_municunit = 229.2

|elevation = 60

|coordinates = {{coord|41|08|N|25|17|E|format=dms|display=inline,title}}

|postal_code =

|area_code =

|licence = ΚΟ

|website =

|image_skyline =

|caption_skyline =

}}

Sostis ({{langx|el|Σώστης|Sóstis}}; {{langx|tr|Susurköy}}) is a village and a former municipality in the Rhodope regional unit, East Macedonia and Thrace, Greece. Since the 2011 local government reform it is part of the municipality Iasmos, of which it is a municipal unit.{{Cite web|url=http://www.et.gr/idocs-nph/search/pdfViewerForm.html?args=5C7QrtC22wGYK2xFpSwMnXdtvSoClrL8-SrPzKAEPjjtIl9LGdkF53UIxsx942CdyqxSQYNuqAGCF0IfB9HI6hq6ZkZV96FIukI0UzcPsWCK0LpLhpa7rhiWB4R5ntTnoWw7U8E1Amg.|title=ΦΕΚ A 87/2010, Kallikratis reform law text|language=el|publisher=Government Gazette}} The municipal unit has an area of 229.190 km².{{cite web|url=http://dlib.statistics.gr/Book/GRESYE_02_0101_00098%20.pdf|publisher=National Statistical Service of Greece|title=Population & housing census 2001 (incl. area and average elevation)|language=el}} The population was 5,521 in 2021.