John Chaloner Smith (19 August 1827 – 13 March 1895) was an Irish civil engineer, remembered as collector of and writer on British mezzotints.
He carried out some major extensions of the line, and was mainly responsible for the Loopline Bridge crossing the River Liffey, connecting the Great Northern and South-Eastern railways of Ireland.
Smith was a collector of engravings, principally mezzotints, which were sold after the completion of his book in sales between 1887 and 1896.
Some 300 of them, especially those by Irish printmakers, were purchased for the National Gallery of Ireland in Dublin through Sir Edward Guinness, and the British Museum bought 106.
[3] Chaloner Smith took an interest in the financial relations between England and Ireland, and published pamphlets on the subject.