Assheton Curzon, 1st Baron Curzon and 1st Viscount Curzon (2 February 1730 – 21 March 1820) was a British Tory politician.
Curzon the second son of Sir Nathaniel Curzon, 4th Baronet, and Mary, daughter of Sir Ralph Assheton, 2nd Baronet. Nathaniel Curzon, 1st Baron Scarsdale, was his elder brother (see Viscount Scarsdale for earlier history of the family). He was educated at Brasenose College, Oxford.
Curzon sat as Member of Parliament for Clitheroe from 1754 to 1777 and from 1792 to 1794. The latter year he was raised to the peerage as Baron Curzon, of Penn in the County of Buckingham, and in 1802 he was further honoured when he was made Viscount Curzon, of Penn in the County of Buckingham.
Lord Curzon married firstly Esther, daughter of William Hanmer, in 1756. After her death in July 1764 he married secondly Dorothy, daughter of Sir Robert Grosvenor, 6th Baronet, in 1766. After her death on 24 February 1774 he married thirdly Anna Margaretta, daughter of Amos Meredith and sister of Sir William Meredith, 3rd Baronet, in 1777. She died in June 1804. There were children from the two first marriages. His daughter, the honourable Charlotte Curzon, married Dugdale Stratford Dugdale of the historic Stratford Family, with their descendants becoming the Dugdale Baronets in 1936. His only son from his first marriage, the Hon. Penn Curzon, predeceased him. Lord Curzon died in March 1820, aged 90, and was succeeded by his grandson, Richard, who was created Earl Howe in 1821. Curzon's son by his second wife, the Honourable Robert Curzon, represented Clitheroe in parliament for many years and was the father of Robert Curzon, 14th Baron Zouche.