Sir John Salusbury, 4th Baronet (died 23 May 1684) was an English politician who sat in the House of Commons from 1661 to 1685.
Salusbury was the son of Sir Thomas Salusbury, 2nd Baronet and his wife Hester, daughter of Sir Edward Tyrrell, 1st Baronet and Elizabeth Kingsmill.
He was a minor when he succeeded to the baronetcy on the death of his brother, Thomas, in 1658.
In 1660, Salusbury was elected Member of Parliament for Denbigh Boroughs.
[1] The family home, Lleweni Hall, passed to his sister, Hester, who married Sir Robert Cotton.