Chazelles-sur-Lyon

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

{{Infobox French commune

|name = Chazelles-sur-Lyon

|commune status = Commune

|image = Chazelles sur Lyon-Usine Fléchet VH-20160317.jpg

|caption = La Chapellerie factory

|image coat of arms = Blason ville fr Chazelles-sur-Lyon (Loire).svg

|arrondissement = Montbrison

|canton = Feurs

|INSEE = 42059

|postal code = 42140

|mayor = Pierre Véricel{{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 =

|coordinates = {{coord|45.6394|4.3925|format=dms|display=inline,title}}

|elevation m = 630

|elevation min m = 414

|elevation max m = 631

|area km2 = 20.91

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

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

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

}}

Chazelles-sur-Lyon ({{IPA|fr|ʃazɛl syʁ ljɔ̃}}, literally Chazelles on Lyon) is a commune in the Loire department in central France.