Lavieu

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

{{Infobox French commune

|name = Lavieu

|commune status = Commune

|image coat of arms = Blason ville fr Lavieu (Loire).svg

|arrondissement = Montbrison

|canton = Montbrison

|INSEE = 42117

|postal code = 42560

|mayor = Bernard Tranchant{{cite web|title=Répertoire national des élus: les maires|url=https://www.data.gouv.fr/fr/datasets/r/2876a346-d50c-4911-934e-19ee07b0e503|publisher=data.gouv.fr, Plateforme ouverte des données publiques françaises|date=13 September 2022|language=fr}}

|term = 2020–2026

|intercommunality = CA Loire Forez

|coordinates = {{coord|45.54|4.0356|format=dms|display=inline,title}}

|elevation m = 720

|elevation min m = 496

|elevation max m = 771

|area km2 = 4.45

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

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

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

}}

Lavieu ({{IPA|fr|lavjø}}) is a commune in the Loire department in central France.