Henri Charles de La Trémoille, 4th Duke of Thouars (17 December 1622 – 14 September 1672) was a French nobleman and military commander.
They had five children, including Charles Belgique, his heir, and Charlotte Amélie de la Trémoille.
In October 1651, during the Fronde, he came out against Cardinal Mazarin and supported the Prince of Condé openly.
In 1668, he returned from Holland to manage the affairs of the duchy of Thouars, his father being weakened by the gout, and he again re-converted to Catholicism, taking away the children from his wife who fled to the Netherlands.
He died two years before his father in 1672; it was thus his elder son, Charles, who succeeded as the fourth duke of Thouars.