Dunmore's Proclamation is a historical document signed on November 7, 1775, by John Murray, 4th Earl of Dunmore, royal governor of the British colony of Virginia. The proclamation declared martial law and promised freedom for slaves of American Patriots who left their owners and joined the British Army, becoming Black Loyalists. The same right was offered to indentured servants. Most relevant historians agree that the proclamation was chiefly designed for practical rather than moral reasons.

John Murray, 4th Earl of Dunmore was a Scottish peer, military officer, and colonial administrator in the Thirteen Colonies and The Bahamas. He was the last royal governor of Virginia. Dunmore was named governor of New York in 1770. He succeeded to the same position in the colony of Virginia the following year after the death of Norborne Berkeley, 4th Baron Botetourt. As Virginia's governor, Dunmore directed a series of campaigns against the trans-Appalachian Indians, known as Lord Dunmore's War. He is noted for issuing a 1775 document, Dunmore's Proclamation, offering freedom to slaves who fought for the British Crown against Patriot rebels in Virginia. Dunmore fled to New York after the burning of Norfolk in 1776 and later returned to Britain. He was Governor of the Bahamas from 1787 to 1796.