Oliver Dyer (April 26, 1824 – January 13, 1907) was an American journalist, author, teacher, lawyer and stenographer. A pioneer in phonography, he developed his own shorthand system which was the first to be adopted for use in the United States. It was used not only for courtroom testimony but also for recording political events such as the Free Soil Convention in Buffalo, New York, and sessions of the 30th United States Congress in Washington, D.C., in 1848. It was in the latter role that he became the first Congressional shorthand reporter.