Maisons-Laffitte (French pronunciation: [mɛzɔ̃ lafit] ⓘ) is a commune in the Yvelines department in the northern Île-de-France region of France.

It is a part of the affluent outer suburbs of northwestern Paris, 18.2 km (11.3 mi) from its centre.

Originally called Maisons-sur-Seine (meaning "Houses upon Seine"), the commune was officially renamed Maisons-Laffitte in 1882 in honour of banker Jacques Laffitte who financed the housing developments on the estate of the Château de Maisons-Laffitte.

Maisons-Laffitte is also known for its horse racing track, the Maisons-Laffitte Racecourse, which is why the town is known as the "cité du cheval" and compared with Newmarket in the United Kingdom.

Église Saint-Nicolas was mainly built between 1867 and 1872 under architect Eugène Millet, on the land of an old cemetery.