Marennes (French pronunciation: [maʁɛn]) is a former commune in the Charente-Maritime department, southwestern France.

On 1 January 2019, it was merged into the new commune Marennes-Hiers-Brouage.

[2] For a long time it was one of the most prosperous cities of the Saintonge due to its location in the middle of the salt-water marshes at a time where salt was a valuable commodity.

Marennes is a center for oyster farming.

This Charente-Maritime geographical article is a stub.