Les Sables-d'Olonne () is
French for "the sands of Olonne". It was founded in 1218 from Havre d'Olonne by Savary I de Mauléon, the Lord of Mauléon, Sénéchal of
Poitou and prince of Talmont. Its history is tied to the ocean for which it has served as a port and point of maritime commerce.
Louis XI separated Les Sables d'Olonne from the town of
Olonne in 1472, improved the harbour, and fortified the entrance. It became the largest cod-fishing port in France, with 14,000 inhabitants, in the 17th century. In 1696 Sables was bombarded by the combined fleets of England and the
Dutch Republic. The current local tourism industry traces its roots to bathing establishments, first begun in 1825. Rail service reached Les Sables on 29 December 1866, via the line from
La Roche-sur-Yon,
Bressuire,
Saumur, and
Tours; express service to and from Paris would arrive in 1971. The city's port served as a base port for American Expeditionary Forces during World War I.
Germany occupied Les Sables d'Olonne during World War II and, upon evacuation of that army at war's end, the German army made an effort to destroy the port, and mined the harbor. ==Population==