Sir Arthur John Otway, 3rd Baronet PC (8 August 1822 – 8 June 1912) was a British barrister and Liberal politician as well as a champion of administrative reform regarding India.

Following that, he travelled to France and Germany, and eventually began education at the Royal Military College, Sandhurst.

After his time in the military, he began to study law at the Middle Temple, one of London's four Inns of Court; in 1850 he was called to the Bar.

Before Otway had held his first brief, however, he began to perceive a need for reform in government, especially regarding the handling of the administration of India.

At the end of 1868, three years into his term as MP of Chatham, Otway was appointed to William Ewart Gladstone's first Government in the post of Under-Secretary of State for Foreign Affairs.

Otway retired from said post in that year over matters of opinion connected to Russia's treatment of the Black Sea Treaty in the Crimean War.