Littleberry C. Mosby Jr. (January 28, 1757 – October 26, 1821) was an American military officer. During the American Revolutionary War, he served in the Continental Army as a captain in the 2nd Georgia Regiment, and was captured at the Siege of Savannah in 1778. After his release, he served as a major commanding a cavalry battalion in the Virginia militia. During the War of 1812, he was a brigadier general in the Virginia militia. The son of Colonel Littleberry Mosby Sr., he lived his entire life at Mosby Tavern in Cumberland County, Virginia/Powhatan County, Virginia, Powhatan County having been created from the eastern portion of Cumberland County in May 1777.