John Prat Hopley (May 21, 1821 – June 3, 1904) was a British-American attorney and newspaperman, known as one of Ohio's most influential publishers.

He studied at the Royal Navy Academy at Camberwell, and in 1842 emigrated to America, first working for an uncle in Zanesville, Ohio, and later teaching in Logan.

Shortly after his marriage, and desiring to study slavery and its influence upon the social life of the South, Hopley spent some years teaching in Tennessee and Kentucky.

He was afterward transferred to the Currency Bureau under Hugh McCulloch, and had charge of the statistical division.

[3][4] Hopley's wife, Georgianna, was active in Ohio campaigns of the Women's Christian Temperance Union.