Thomas Manners-Sutton, 1st Baron Manners, PC (24 February 1756 – 31 May 1842) was a British lawyer and politician who served as Lord Chancellor of Ireland from 1807 to 1827.

The latter year he was admitted to the Privy Council, raised to the peerage as Baron Manners, of Foston in the County of Lincoln,[2] and appointed Lord Chancellor of Ireland, in which position he served until 1827.

His unfamiliarity with Irish conditions led him to rely heavily on the Attorney-General for Ireland, William Saurin, who thereby acquired unprecedented power and virtually controlled the Dublin administration until his dismissal in 1822, which was caused by his firm opposition to Emancipation, which made him a political liability.

The increasing number of Catholic barristers (even Daniel O'Connell, who had a low opinion of most Irish judges) paid tribute to his impartiality.

A family relation, Evelyn Levett Sutton, graduate of Trinity College, Cambridge, acted as private chaplain to Lord Manners.