Lieutenant General Henry Louis Larsen (December 10, 1890 – October 2, 1962) was a United States Marine Corps officer, the second Military Governor of Guam following its recapture from the Empire of Japan, and the first post-World War II Governor of Guam. He also served as the Military Governor of American Samoa alongside civilian Governor of American Samoa Laurence Wild. Larsen was among the first troops overseas in both World Wars. During World War I, he commanded the 3rd Battalion 5th Marines and participated in numerous battles in France, earning the Navy Cross, three Silver Stars, the Croix de guerre with palm, and the French Legion of Honour. In between the World Wars, he served during the United States occupation of Nicaragua, where he earned his second Navy Cross, the Presidential Medal of Merit from President of Nicaragua José María Moncada Tapia, and his first Navy Distinguished Service Medal.