Two years in the World war somewhat retarded the advancement in the law of Johnson Daniel McMahon of Rome, Oneida county, New York, but since that conflict has been ended he has been busily engaged in making up for lost time. Mr. McMahon has just finished serving a two-year term as corporation counsel of Rome, and has been appointed deputy attorney-general on special assignment for the state of New York, an appointment that does not preclude proper attention to his large private practice in the city of Rome and the Mohawk valley section of the state. He was born on March 8, 1887, in Rome, Oneida county, New York, the son of John Daniel and Julia F. (Johnson) McMahon, mentioned elsewhere in this work.
The early education of Johnson Daniel McMahon was obtained in the public schools of Rome and at the Rome Free Academy, after which he attended Phillips Exeter Academy, from which he graduated in 1906, and then matriculated in Harvard University, at Cambridge, Massachusetts, from which he received the degree of A. B. and graduated in 1910. After leaving the university Mr. McMahon studied law in the office of his father, John D. McMahon, at Rome, New York, was admitted to practice in March, 1914, and was appointed deputy attorney-general of New York state in July, 1914. He practiced law as a member of the firm of McMahon & McMahon until July, 1917, when he entered the military service of the United States. Mr. McMahon served as deputy attorney-general of New York from July, 1914, until January, 1915; as corporation counsel of the city of Rome from January, 1922, until January, 1924, and was appointed deputy attorney-general of the state on special assignment on January 25, 1924.
During the World war Mr. McMahon entered the training camp at Plattsburgh, New York, in the summer of 1916, served at Madison Barracks in the summer of 1917, and was a captain of Field Artillery from August, 1917, until July, 1919, serving in France in command of Battery D, Three Hundred and Sixteenth Field Artillery.
Mr. McMahon is interested in a number of the industrial and financial institutions of Rome and the Mohawk valley, and is a director in the Rome Trust Company, the Rome Savings Bank, the Spargo Wire Company, Incorporated, the Rome Turney Radiator Company, and some others. He is a democrat in his political views and is a member of the democratic state committee. Fraternally Mr. McMahon is affiliated with the Benevolent Protective Order of Elks and the Moose. He also belongs to the New York State Bar Association, the American Bar Association, the Oneida County Bar Association, the Harvard Club of New York, the Rome Club, the Teugega Country Club, the Rotary Club of Rome, the Adirondack League Club, the Triton Fish and Game Club, the Fish Creek Club, and the City Club of Utica.