Admiral Sir James Whitley Deans Dundas GCB (4 December 1785 – 3 October 1862) was a Royal Navy officer. He took part in the Napoleonic Wars, first as a junior officer when he took part in the Anglo-Russian invasion of Holland in Autumn 1799 and later as a commander when he was in action at Copenhagen Dockyard shortly after the capture of that City in August 1807. He also served as Whig Member of Parliament for Greenwich and then for Devizes and became First Naval Lord in the First Russell ministry in July 1847 and in that role his service was dominated by the needs of Whig party. 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.