Leete was born about 1612 or 1613 at Diddington, Huntingdonshire, England, the son of John Leete and his wife Anna Shute, daughter of Robert Shute, a justice of the King"s Court. His first wife, and mother of all ten of his known children, was Anna Payne, daughter of Reverend John Payne of Southoe.
He was educated as a lawyer, and served as a clerk in Bishop"s Court at Cambridge, England.
She died on February 10, 1673. She died on December 13, 1683. On 1 June 1639, William Leete was among the 25 signers of the Plantation Covenant on shipboard.
Leete was town clerk of Guilford, Connecticut from 1639 to 1662, and Justice of the Peace there in 1642.
He served as town magistrate at Guilford from 1651 to 1658, and as deputy from Guilford to the New Haven Colony General Court from 1643 to 1649. He was Commissioner of New Haven Colony (1655-1658), Deputy Governor (1658-1661) and Governor of the New Haven Colony from 1661 to 1664.
After the consolidation of New Haven Colony and the Colony of Connecticut, he became Governor of the Colony of Connecticut from 1676 to 1683. He is the only man to serve as governor of both New Haven and Connecticut.
Leete is remembered for sheltering the Regicides William Goffe and Edward Whalley in Guilford.
When Leete was Deputy Governor and Chief Magistrate of the colony, he helped prevent the capture of the two former English judges who were being sought by King Charles II for signing the death warrant of his father, Charles I. When agents of the king came looking for the fugitive judges, Leete cooperated enough to avoid being accused of obstruction of justice, but did not provide enough information for the judges to be captured. Leete moved from Guilford to Hartford, Connecticut died there in April 1683. He is interred at Hartford, Connecticut in Hartford"s Ancient Burying Ground.
Leete"s Island in Branford/Guilford is named for him.
