Henry Seymour Conway, English general and politician, Secretary of State for the Northern Department (born 1721)

Field Marshal Henry Seymour Conway was a British Army officer and politician. A brother of the 1st Marquess of Hertford, and cousin of Horace Walpole, he began his military career in the War of the Austrian Succession. He held various political offices including Chief Secretary for Ireland, Secretary of State for the Southern Department, Leader of the House of Commons and Secretary of State for the Northern Department. He eventually rose to the position of Commander-in-Chief of the Forces.

The secretary of state for the Northern Department was a position in the Cabinet of the government of Great Britain up to 1782. Following this, the Northern Department became the Foreign Office, and the position evolved into the foreign secretary.