Castets-en-Dorthe (French pronunciation: [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.

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

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