Sir John Cust, 3rd Baronet

For other people named John Cust, see John Cust (disambiguation).

The Right Honourable
Sir John Cust
Bt PC
Sir John Cust, 3rd Baronet, dressed as Speaker of the House of Commons
Speaker of the House of Commons
of Great Britain
In office
3 November 1761 – 19 January 1770
MonarchGeorge III
Prime MinisterThomas Pelham-Holles
John Stuart
George Grenville
Charles Watson-Wentworth
William Pitt
Augustus FitzRoy
Preceded byArthur Onslow
Succeeded bySir Fletcher Norton
Monument in Belton Church to Sir John Cust, 3rd Baronet. Arms: Cust quartering Brownlow with inescutcheon of pretence of Payne, for his heiress wife

Sir John Cust, 3rd Baronet PC (29 August 1718 – 24 January 1770), of Belton House near Grantham in Lincolnshire, was a British politician who served as Speaker of the House of Commons from 1761 to 1770.