29 January – after a month's absence, Elizabeth Canning returns to her mother's home in London and claims that she was abducted. The following criminal trial causes uproar.
6 June – Parliament passes Lord Hardwicke's Marriage Act "for the Better Preventing of Clandestine Marriage" in England and Wales, requiring marriages to be performed by licensed ministers and the reading of banns of marriage; it comes into effect in 1754. Jews and Quakers are exempted.
7 June – the British Museum is established in London by Act of Parliament.
7 July – Parliament's Jewish Naturalization Act, a measure to end discrimination against Jews, receives royal assent, but widespread opposition leads to its repeal in 1754.
23 October – first naval patients admitted to Royal Hospital Haslar in Hampshire. When the main building is completed in 1762 this will be the world's largest hospital and Europe's largest brick building.