Nathaniel Pettit (June 12, 1724 – March 9, 1803) was a political figure in Upper Canada.Pettit was born in Sussex County, New Jersey in 1724. In 1766, he was appointed judge in the county's Court of Common Pleas and he was elected to the legislature in 1768. He opposed taxation without representation and joined a committee supporting a boycott of goods imported from Britain.