Louis Rémy Mignot (February 3, 1831 – September 22, 1870) was an American painter of Catholic descent.

Associated with the Hudson River School of landscape artists, his southern US heritage and the influence of his time spent in Europe gave him a distinct style within that group, in painting vegetation and atmospheric effects.

Starting in 1850 he worked for four years in Andreas Schelfhout's studio in The Hague, Netherlands, then travelled in Europe.

Returning to New York City, he soon travelled with artist Frederic Edwin Church to Ecuador in 1857, gathering material for his paintings of the tropics, the subject of a large portion of his subsequent work.

With the outbreak of the American Civil War, he raised money with a sale of his paintings, then sailed to England in June 1862, where he lived in London.