John Cust

John Cust may refer to:
 * Sir John Cust, 3rd Baronet (1718–1770), British politician, Speaker of the House of Commons
 * John Cust, 1st Earl Brownlow (1779–1853), British politician and peer
 * John Egerton, Viscount Alford (1812–1851), British politician (born John Hume Cust)
 * John Cust (footballer) (1874–1954), Scottish footballer