Sir Charles Douglas, 1st Baronet was a British naval officer. He was a midshipman at the Siege of Louisbourg, promoted to lieutenant in 1753 and to commander in 1759. By the end of the war in 1763, he was captain of HMS Syren. After the American War of Independence broke out in America in 1775, Douglas was given command of a squadron to relieve Quebec from the siege. When he arrived at the Gulf of St. Lawrence, he decided to ram the ice and successfully made his way up the river, surprising the Americans and putting them on the run. He was also in charge of creating a navy from scratch to fight on Lake Champlain, and that small fleet routed the Americans under Benedict Arnold. In 1777, he was made a baronet for his service in Quebec. As captain of HMS Stirling Castle, he took part in the first Battle of Ushant.

In 1781, Sir Charles became Captain-of-the-Fleet for George Brydges Rodney, 1st Baron Rodney, and was with Rodney on his flagship, Formidable, at the Battle of the Saintes off Dominica, where on 12 April 1782, they defeated the Comte de Grasse by breaking the French line. Douglas is credited by many, including Sir Charles Dashwood (a midshipman present at the time who later became an admiral himself), for having the idea for the maneuver, but it is a subject of much debate. In 1783, he was made the Commander-in-Chief of North America at the Halifax, Nova Scotia Station, but resigned due to a conflict. In 1787 he became a rear-admiral, and in 1789 was once again made commander of the Nova Scotia station, but died of apoplexy before taking his post.