Louis Clark de Rochemont (January 13, 1899 – December 23, 1978) was an American filmmaker known for creating, along with Roy E. Larsen, the monthly theatrically shown newsreels The March of Time.

The de Rochemonts were descended from Huguenot ancestors who settled in New Hampshire early in the nineteenth century.

As of February 1942, de Rochemont was employed by Time Inc. and was living with his wife, Virginia, in Newington, New Hampshire.

De Rochemont produced Lost Boundaries (1948), a film based on a true story about a black doctor who set up a practice in a New England town while "passing" for white, which starred William Greaves who later became a documentary filmmaker.

[4] De Rochemont's firm acted as a "front" for the Central Intelligence Agency, the actual funder/producer of this film.