Peregrine Cust (1723 – 2 January 1785) was a British politician and Member of Parliament (MP).
[2] Peregrine was educated at The King's School, Grantham, and apprenticed to a firm of linen drapers in 1739.
After investing £1,200 and having gained the interest of Charles Walcott, Cust was elected as MP for Bishop's Castle in 1761.
[2] Cust did not stand in the resulting re-election, but instead stood for Grantham in 1776, to which seat he was elected.
He represented Grantham until 1780, when he again stood for Ilchester, and this time was declared duly elected.