Sir William Morice, 1st Baronet (c. 1628 – 7 February 1690), of Werrington (then in Devon but now in Cornwall), was an English Member of Parliament.
Morice was the eldest son of Sir William Morice, a Member of Parliament who assisted in the Restoration of King Charles II, and was knighted and appointed Secretary of State for the Northern Department in 1660.
The younger William was created a baronet on 20 April 1661. In 1689, he entered the House of Commons as Member of Parliament (MP) for Newport, in Cornwall, but died a year later.
He married twice: