Adelbert Althouse (May 23, 1869 – May 17, 1954) was a United States Navy Captain who served as the 27th and 29th Naval Governor of Guam.

He earned the Navy Cross for his actions commanding USS Brooklyn and serving as Chief of Staff for the Commander and Chief of the United States Asiatic Fleet during the World War.

[5] As a lieutenant, he served as watch and division officer aboard USS Massachusetts.

[1] As a lieutenant commander, he served as navigating officer aboard USS Vermont.

In an effort to promote the spread of English among local children, he burned a large number of Chamorro-English dictionaries and banned the use of Chamorro in the classroom and on playgrounds.