Nathan Dane (December 29, 1752 – February 15, 1835) was an American lawyer and statesman who represented Massachusetts in the Continental Congress from 1785 through 1788. Dane helped formulate the Northwest Ordinance while in Congress, and introduced an amendment to the ordinance prohibiting slavery in the Northwest Territory.
Dane was born at Ipswich in Essex County, Massachusetts. His father Daniel Dane was a farmer, and his mother's name was Abigail. Ancestor John Dane Sr. had immigrated to Massachusetts from England (not Denmark) in 1636.
Dane worked on the family farm in Ipswich until he turned twenty. Moving on to college at Harvard, his major interest was in mathematics, and he graduated in 1778. Then he taught school and read for the law. In 1779 he married Mary Brown (they would have no children).
Dane was admitted to the bar and set up a legal practice in Beverly in 1782. That same year, he entered elective office in the Massachusetts House of Representatives, where he served until 1785. Dane's hearing was poor throughout his career, and steadily got worse.
In 1785, Dane became a Massachusetts delegate to the Continental Congress, where he helped draft the Northwest Ordinance, which was enacted on July 13, 1787. The Ordinance encouraged American settlers into the Northwest Territory and formed the basis of the constitutions of the five states there: Ohio, Indiana, Illinois, Michigan and Wisconsin. The Ordinance also banned slavery in the Northwest Territory. Dane’s amendment banning slavery was offered at the last minute, and was quickly accepted without much discussion, to the surprise of Dane himself, who “had no idea the States would agree to the sixth article, prohibiting slavery…."