John Williams (10 February 1777 – 15 September 1846) was an English Whig politician, lawyer and judge. John Williams was educated at Trinity College, Cambridge. He was elected as a Member of Parliament (MP) for Lincoln at a by-election in March 1822, and held the seat until the 1826 general election, when he was returned on 9 June for Ilchester. However, that result was overturned on 22 February 1827 after an election petition, and Williams did not return to the House of Commons until February 1830, when he was returned for Winchelsea at a by-election. He held that seat until the borough was disenfranchised at the 1832 general election.