The 1831 United Kingdom general election saw a landslide win by supporters of electoral reform, which was the major election issue. As a result, it was the last unreformed election, as the following Parliament ensured the passage of the Reform Act 1832. Polling was held from 28 April to 1 June 1831. The Whigs won a majority of 136 over the Tories, which was as near to a landslide as the unreformed electoral system could deliver. As the Government obtained a dissolution of Parliament once the new electoral system had been enacted, the resulting Parliament was a short one and there was another election the following year. The election was the first since 1715 to see a victory by a party previously in minority.

The Representation of the People Act 1832 was an Act of Parliament of the United Kingdom that introduced major changes to the electoral system of England and Wales. It reapportioned constituencies to address the unequal distribution of seats and expanded franchise by broadening and standardising the property qualifications to vote. Only qualifying men were able to vote; the Act introduced the first explicit statutory bar to women voting by defining a voter as a male person.