Oliver Law (October 23, 1900 – July 9, 1937) was an African-American communist and labor organizer, who fought for the Republic in the Spanish Civil War.

Law was married to Corrine Booker Light-foot, mother of the regional Communist Party of the USA (CPUSA) leader Claude Lightfoot.

Having met the International Brigades at Albacete, Law first served as a group leader of a machine-gun company engaged on the Jarama front.

After failing to take Madrid by frontal assault, General Francisco Franco gave orders for the road that linked the city to the rest of Republican Spain to be cut.

The battalion leadership was annihilated at Jarama and Law advanced fast in rank, even though there was some criticism of his performance at the attack on Villanueva de la Cañada.

The experienced battalion commander Martin Hourihan recognized Law's abilities and wanted to send him to officer's training school.