John William Clouser (born March 29, 1932) was an American robber who was on the FBI Ten Most Wanted Fugitives list in 1965.
A former police officer and detective in Orlando, Florida, Clouser was added on the list on January 7, 1965 and removed when a federal process against him was dismissed in 1972.
He was previously committed to a mental hospital after being arrested for kidnapping and armed robbery, which he later escaped.
He later authored a book, The Most Wanted Man in America detailing the time he eluded authorities while on the list.