Arthur Saunders William Charles Fox Gore, 5th Earl of Arran, KP, DL (6 January 1839 – 14 March 1901), styled Viscount Sudley from 1839 to 1884, was an Anglo-Irish peer and diplomat.

His mother was descended from two of the Lennox sisters, famous Regency-era aristocratic daughters of the 2nd Duke of Richmond (a grandson of Charles II).

In 1884 he succeeded his father as fifth Earl of Arran but as this was an Irish peerage it did not entitle him to a seat in the House of Lords.

However, later the same year he was created Baron Sudley, of Castle Gore in the County of Mayo, in the Peerage of the United Kingdom, which gave him an automatic seat in the upper chamber of Parliament.

They had one daughter: Lord Arran died at his home in Mayfair on 14 March 1901, aged 62, and was succeeded in his titles by his only son Arthur.