Castets-en-Dorthe

{{Infobox French commune

|name = Castets-en-Dorthe

|image = Castets-en-Dorthe Mairie.jpg

|caption = Town hall

|arrondissement = Langon

|canton = Le Sud-Gironde

|commune = Castets et Castillon

|INSEE = 33106

|postal code = 33210

|coordinates = {{coord|44.5628|-0.1519|format=dms|display=inline,title}}

|elevation m = 20

|elevation min m = 6

|elevation max m = 56

|area km2 = 8.69

|population = 1251

|population date = 2022

|population footnotes = {{cite web|url=https://www.insee.fr/fr/statistiques/fichier/8290591/ensemble.pdf|title=Populations de référence 2022|language=fr|trans-title=Reference populations 2022|publisher=INSEE|date=December 2024}}

}}

Castets-en-Dorthe ({{IPA|fr|kastɛts ɑ̃ dɔʁt}}; Gascon: Castèths Andòrta) is a former commune in the Gironde department in Nouvelle-Aquitaine in southwestern France. On 1 January 2017, it was merged into the new commune Castets et Castillon.[https://www.legifrance.gouv.fr/eli/arrete/2016/8/1/INTB1622460A/jo/texte Arrêté préfectoral] 1 August 2016 {{in lang|fr}}

The village lies at the junction of the Canal de Garonne with the river Garonne.