Hardy came from a naval family. His father was Vice-Admiral Sir Charles Hardy, and one of his brothers, Charles Hardy, became an admiral.
Career
He became a merchant, emphasizing trade between Great Britain and the North American colonies. In 1761, he was appointed as Governor of New Jersey, serving until 1763. He was succeeded by William Franklin, the son of Benjamin Franklin, who were both born in the colony of Pennsylvania.
Marriage and family
Hardy married Harriet, daughter of Sir Thomas D'Aeth, and they had five daughters: Harriet, Elizabeth Sophia, Priscilla, Louisa and Charlotte.