Peter Robert Drummond-Burrell, 2nd Baron Gwydyr, 22nd Baron Willoughby de Eresby PC (19 March 1782 – 22 February 1865), was a British nobleman. He was the son of Peter Burrell, 1st Baron Gwydyr (died 1820), and Priscilla Bertie, 21st Baroness Willoughby de Eresby (died 1828).
From 1812 until 1820, he was Member of Parliament for Boston in Lincolnshire. Up to the 1832 Reform Act Drummond-Burrell was a Whig, but by 1841 had changed his allegiance to the Tories.
On 29 June 1820, he succeeded his father as 2nd Baron Gwydyr, 3rd Baronet Burell of Knipp and Deputy Lord Great Chamberlain. And on 29 December 1828, he succeeded his mother as 22nd Baron Willoughby de Eresby and joint (1/2) hereditary Lord Great Chamberlain.
On 19 October 1807, he married Sarah Clementina née Drummond, daughter of James Drummond, 11th Earl of Perth, and Clementina Elphinstone. They had five children:
His wife died on 26 January 1865. He died nearly a month later, on 22 February 1865. They are buried side by side in the churchyard of St Michael and All Angels, Edenham, Lincolnshire. The canopied tomb of their second daughter, Elizabeth Susan (d. 1853) is adjacent, and those of their son Albyric (d. 1870) and grandson Gilbert Heathcote-Drummond-Willoughby, 1st Earl of Ancaster (d. 1910), are nearby. All five tombs are Grade II listed, some jointly.