Lyas

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

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

{{Infobox French commune

|name = Lyas

|commune status = Commune

|arrondissement = Privas

|canton = Privas

|INSEE = 07146

|postal code = 07000

|mayor = François Veyreinc{{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 Privas Centre Ardèche

|coordinates = {{coord|44.7403|4.6006|format=dms|display=inline,title}}

|elevation m = 575

|elevation min m = 220

|elevation max m = 803

|area km2 = 7.95

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

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

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

}}

Lyas ({{IPA|fr|ljas}}; {{langx|oc|Lias}}) is a commune in the Ardèche department in southern France.