John Arthur Douglas Bloomfield, 2nd Baron Bloomfield, GCB, PC, DL (12 November 1802 – 17 August 1879) was a British peer and diplomatist.
From 1816-1818 he was a First Page of Honour for George III. At 16 he became an attache to Vienna. This was the start of his political career which took him too Lisbon, Stockholm, St. Petersburg and other cities.