Nathaniel Ryder, 1st Baron Harrowby (3 July 1735 – 20 June 1803) was a British politician who sat in the House of Commons from 1756 to 1776 when he was raised to the peerage as Baron Harrowby. Ryder was the son of Sir Dudley Ryder, Lord Chief Justice of the King's Bench. He was admitted at Clare College, Cambridge in 1753. In 1756, Ryder was elected Member of Parliament for Tiverton, a seat he held until 1776. On 20 May 1776 he was raised to the peerage as Baron Harrowby, of Harrowby in the County of Lincoln. He later served Deputy Lieutenant of Staffordshire and Lincolnshire.