Charles Cavendish, Viscount Mansfield

Charles Cavendish, Viscount Mansfield (c. 1626 – June 1659) was an English politician who sat in the House of Commons from 1640 to 1644. He supported the Royalist cause in the English Civil War.

Viscount Mansfield was the eldest son and heir of William Cavendish, 1st Duke of Newcastle-upon-Tyne and his first wife, Elizabeth Basset of Blore. He was known as Viscount Mansfield, his father's courtesy title.

In November 1640, Mansfield was elected Member of Parliament for East Retford in the Long Parliament. He was disabled from sitting in 1644. He went into exile with his father, and returned to England in 1659.

Mansfield married Elizabeth Rogers, daughter of Richard Rogers and Anne Cheek. Mansfield died at the age of 32 while his father was still alive. His younger brother Henry succeeded their father as second duke of Newcastle.