List of ambassadors of the United Kingdom to Spain

The Ambassador of the United Kingdom to Spain is the United Kingdom's foremost diplomatic representative in the Kingdom of Spain, and in charge of the UK's diplomatic mission in Spain. The official title is His Britannic Majesty's Ambassador to the Kingdom of Spain.

The British ambassador to Spain is also non-resident ambassador to the Principality of Andorra.

In 1822, Foreign Secretary George Canning downgraded the Embassy to a Mission, and the Head of Mission from an Ambassador to an Envoy Extraordinary and Minister Plenipotentiary, to reflect Spain's decreased importance on the world stage. The Mission in Madrid was upgraded to a full Embassy once more on 9 December 1887.

List of heads of mission
The following is a partial list of British ambassadors to Spain.

Titles of the heads of mission:
 * From 1509 to 1683: Ambassador
 * From 1683 to 1710: Envoy Extraordinary
 * From 1711 to 1821: Ambassador
 * From 1822 to 1887: Envoy Extraordinary and Minister Plenipotentiary
 * Since 1887: Ambassador