Tourville (S637) is a French nuclear attack submarine (SNA). After the and , it is the third of six Suffren-class submarines in the Barracuda program, the French Navy's second-generation nuclear attack submarine. Like several French naval ships before her, she is named after Vice-Admiral and Marshal of France Anne Hilarion de Costentin de Tourville.
Construction began on 28 June 2011, at Cherbourg. She first set sail in July 2024. A few weeks later, on 11 September, the Red crew of the new submarine was formed at a ceremony at Fort Saint-Louis, Toulon. Just over two weeks after her departure, Tourville returned to Cherbourg for a technical intervention to apply a few corrective measures. The submarine was delivered to the navy and entered active service on 16 November 2024. She was declared fully operational in July 2025.
One of her first missions was a visit to Canada in March 2025 to test cold water performance. It targeted a possible Canadian buy of French subs by its navy.