The Saint Louis was a 90-gun Suffren-class Ship of the line of the French Navy.

She was the twenty-second ship in French service named in honour of Louis IX of France.

She took part in the Crimean War as a troopship,[1] In July 1854, she ran aground at Kiel, Prussia.

[2] She bombed the Tétouan forts on 20 November 1859, and served in the French intervention in Mexico in 1862.

[1] She was renamed Cacique in 1881 and served as a gunnery school, and was eventually broken up in 1895.