Château d'Armaillé, 19th century château in Loches, France.

Château d'Armaillé is a 19th-century château in Loches built from tuffeau stone interlaced with red brick in the Napoleon III style. Its pale stone facade has three levels of tall windows with red brick surrounds, dormers in a dark slate roof, and a central tower capped by a domed roof and open lantern. The building faces a lawn within 7.4 acres of English-style grounds.

The château was built for Count Arthur de Marsay on the site of a Capuchin monastery, which after the French Revolution had become an 80-room private hunting lodge in the Royal Forest. It was named after his daughter, the Viscountess Armaillé, and stayed in the family until the State bought it in 1947. Extended west in the late 1800s, it housed the French Marine Department archives during World War II, was renovated in the 1970s and 2000s, and was sold back into private hands in 2019.

The château is named after the daughter of Count Arthur de Marsay, the Viscountess Armaillé. It stayed in the family until 1947, when the State bought it; in the 2000s the stables held the office of the Sous-Préfecture and the residence housed the local sous-préfets. Sold by the department in 2019, it returned to private residential use.

The château is not open to the public; visitors view the pale stone and red brick facade and the domed central tower from the lawn and grounds. The 7.4-acre English-style garden lies beside the Indre, with the driveway and entrance to the east near the 'three bridges' linking Loches to Beaulieu-les-Loches.

The property borders the Indre River and connects the Royal City of Loches with Beaulieu-les-Loches through protected wetland areas. This location makes the château a key geographic link between two important towns in the region.