Admiral Sir James Whitley Deans Dundas, GCB (4 December 1785 – 3 October 1862) was a Royal Navy officer.

He was appointed Commander-in-Chief in the Mediterranean in 1852 and led all naval operations in the Black Sea including the bombardment of Sevastopol in October 1854 during the Crimean War.

[2] Dundas was given command of the third-rate HMS Stately, flagship of Rear Admiral Thomas Bertie, in the Baltic Fleet in March 1809.

[2] He was then given command of the first-rate HMS Britannia, as flag captain to Admiral Sir Philip Durham who was Commander-in-Chief, Portsmouth, in 1836.

[9][10] Promoted to vice-admiral on 17 December 1852,[11] he led all naval operations in the Black Sea in command of the Baltic Fleet, including the bombardment of Sevastopol in October 1854, during the Crimean War.

[1] His first wife died in April 1846 and, in August 1847, he married Lady Emily Moreton, fourth daughter of Thomas Reynolds-Moreton, 1st Earl of Ducie.