Louis A. Kaiser (1870 – August 12, 1939) was a Captain in the United States Navy, as well as briefly in charge of the government on Guam.
He was a pioneer in the Navy on the use of wireless telegraphy, prior to World War I. Kaiser was born in Kirkwood, Illinois.
In the Spanish–American War, he continued to serve on Concord, and he fought in the Battle of Manila Bay.
In 1899, he was briefly made in charge of the government of Guam, in preparation for the arrival of Governor Richard Phillips Leary.
In 1923, he was briefly the acting-commandant of the 8th Naval District before being assigned to the New York hydrographic office.