On March 22, 1898, the United States Army finally awarded King the Medal of Honor for his actions at White Oak Swamp.

Rank and organization: First Lieutenant, 4th U.S. Artillery.
Place and date: At White Oak Swamp Bridge, Va., June 30, 1862.
Entered service at: New York.
Birth: New York.
Date of issue: April 2, 1898.

Citation:
This officer, when his captain was wounded, succeeded to the command of two batteries while engaged against a superior force of the enemy and fought his guns most gallantly until compelled to retire.
On March 22, 1898, the United States Army finally awarded King the Medal of Honor for his actions at White Oak Swamp.
Rank and organization: First Lieutenant, 4th U.S. Artillery. Place and date: At White Oak Swamp Bridge, Va., June 30, 1862. Entered service at: New York. Birth: New York. Date of issue: April 2, 1898.
Citation:
This officer, when his captain was wounded, succeeded to the command of two batteries while engaged against a superior force of the enemy and fought his guns most gallantly until compelled to retire.
Rufus King Jr.