Charles R. Adams (February 9, 1834 – July 4, 1900) was an American opera singer and singing instructor.
An excellent tenor and fine actor, he had a commanding stage presence and was particularly admired for his interpretations of the works of Richard Wagner.
Adams stayed there for three years, before becoming the principal tenor of the Vienna Hofoper from 1867 to 1876.
Adams toured America with the Carl Strakosch company in 1877 and 1878, singing among other parts the title role in the first American production of Wagner's Rienzi.
His students included the likes of Arthur Middleton, Grace Hiltz, Nellie Melba, Allie Luse Dick, and Emma Eames, the latter being his most celebrated pupil.