Sinceny

{{Use dmy dates|date=August 2023}}

{{Expand French|topic=geo|date=December 2008|Sinceny}}

{{Infobox French commune

|name = Sinceny

|commune status = Commune

|image = Sinceny (Aisne) mairie.JPG

|caption = The town hall of Sinceny

|image coat of arms = Blason ville fr Sinceny (Aisne).svg

|arrondissement = Laon

|canton = Chauny

|INSEE = 02719

|postal code = 02300

|mayor = Bernard Pezet{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|website=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=2 December 2020|language=fr}}

|term = 2020–2026

|intercommunality = CA Chauny Tergnier La Fère

|coordinates = {{coord|49.5969|3.2472|format=dms|display=inline,title}}

|elevation m = 70

|elevation min m = 42

|elevation max m = 113

|area km2 = 13.13

|population = {{France metadata Wikidata|population_total}}

|population date = {{France metadata Wikidata|population_as_of}}

|population footnotes = {{France metadata Wikidata|population_footnotes}}

}}

Sinceny ({{IPA|fr|sɛ̃sni}}) is a commune in the Aisne department in Hauts-de-France in northern France.