Sir Henry Spelman (c.1562 – October 1641) was an English antiquary, noted for his detailed collections of medieval records, in particular of church councils.
Spelman was born in Congham, Norfolk, the eldest son of Henry Spelman (d. 1581), of Congham, and the grandson of Sir John Spelman (1495-1544). He graduated from at Trinity College, Cambridge in 1583.
He sat in parliament as member for Castle Rising in 1593 and 1597-98. Knighted in 1603, he was appointed High Sheriff of Norfolk in 1604. In 1612, he settled in London near his friend Sir Robert Bruce Cotton. In 1617, he served on a commission to inquire into disputed Irish estates, and later took part into legal inquiries into the exactions levied on behalf of the Crown in the civil and ecclesiastical courts. Henry Spelman continued to rise in prestige served as a member of the Parliament of England for Worcester in 1625. In 1627, he became treasurer of the Guiana Company, and he was also an energetic member of the council for New England. His general services to the state were recognized in 1636 by a gift of money and two years later by the offer of the mastership of Sutton's Hospital, Charterhouse.
He died in London in October 1641, and was buried in Westminster Abbey.
Spelman married Eleanor l'Estrange in 1590.
His later years were spent in the house of his son-in-law, Sir Ralph Whitfield. He was survived by his son, John Spelman, and a daughter, Catherine, who married a Secretary of State.
His histories include Concilia Ecclesiastica Orbis Britannici and Glossarium Archaiologicum (completed by William Dugdale). His Reliquiae Spelmannianae was edited by Edmund Gibson in 1698.