John Cust, 1st Earl Brownlow, GCH (19 August 1779 – 15 September 1853) was a British Peer and Tory politician.

In 1802 he was elected the MP for Clitheroe, holding the seat until 1807,[1] when he succeeded his father's title and estates, including Belton House near Grantham, Lincolnshire.

In 1821, Brownlow's younger brother, Sir Edward Cust, 1st Baronet (1794–1878), had married Mary Anne Boode (1799–1882).

Brownlow and Wilbraham Egerton of Tatton Park acted as co-trustees and executors of Margaret Boode's estate when she died in 1827.

As his eldest son had pre-deceased him in 1851, on his own death in 1853 his titles and estates passed to his grandson, John William Spencer Egerton-Cust[5]