Charles Abbot, 1st Baron Colchester PC, FRS (14 October 1757 – 8 May 1829) was a British barrister and statesman.

[4] In 1795, after having practised twelve years as a barrister, and having published a treatise proposing the incorporation of the judicial system of Wales with that of England, he was appointed to the office previously held by his brother of clerk of the rules in the King's Bench; and in June of the same year he was elected Member of Parliament for Helston, through the influence of the Duke of Leeds.

Abbot's efforts also effected the establishment of the Record Commission; the reform of the system which had allowed the public money to lie for some time at long interest in the hands of the public accountants, by charging them with payment of interest; and, most important of all, the act for taking the first census of the United Kingdom, that of 1801.

In the February of the following year he was appointed Speaker of the House of Commons: at this point he stood down as Chief Secretary for Ireland, but he remained Keeper of the Privy Seal until his death.

He was succeeded by his elder son Charles, Postmaster General in 1858, and subsequently by his grandson Reginald Abbot, 3rd Baron Colchester, on whose death in 1919 the title became extinct.