Langdon, John (1741–1819)

American politican. A member of the Continental Congress, he served for a time in the American Revolution and took part in the Constitutional Convention. He was in Congress for several terms, and became senator from New Hampshire. He later served as governor of New Hampshire.

Langdon was born in Portsmouth, New Hampshire. After leading a seafaring life, he became a merchant, and took part in the first overt acts against the British crown committed in his native colony. In 1776 he was made an agent of prize money for New Hampshire, and also naval agent for the Continental Congress, securing the building of some of the ships used by John Paul Jones.