Gaillagos

{{Infobox French commune

|name = Gaillagos

|commune status = Commune

|image coat of arms = Blason ville fr Gaillagos (65).svg

|arrondissement = Argelès-Gazost

|canton = La Vallée des Gaves

|INSEE = 65182

|postal code = 65400

|mayor = Thierry Dumestre-Courtiade{{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 = Pyrénées Vallées des Gaves

|coordinates = {{coord|42.9825|-0.1747|format=dms|display=inline,title}}

|elevation m = 900

|elevation min m = 734

|elevation max m = 1617

|area km2 = 8.46

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

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

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

}}

Gaillagos ({{IPA|fr|ɡajaɡɔs}}; {{langx|oc|Galhagòs}}) is a commune in the Hautes-Pyrénées department in south-western France.