John Alexander Bryan (April 13, 1794 in Berkshire County, Massachusetts – May 24, 1864 in Menasha, Wisconsin) was an American diplomat and politician from New York and Ohio.
He removed to Ellicottville, New York, and was a member of the New York State Assembly (Cattaraugus Co.) in 1827.
Later he lived in Milwaukee and Menasha, Wisconsin.
He served as editor of The Daily Milwaukee News.
His son Charles Henry Bryan was a California State Senator, and his son-in-law John B. Weller was a U.S.