The Poor Law Amendment Act 1834 (PLAA) known widely as the New Poor Law, was an Act of the Parliament of the United Kingdom passed by the Whig government of Earl Grey denying the right of the poor to subsistence. It completely replaced earlier legislation based on the Poor Relief Act 1601 and attempted to fundamentally change the poverty relief system in England and Wales. It resulted from the 1832 Royal Commission into the Operation of the Poor Laws, which included Edwin Chadwick, John Bird Sumner and Nassau William Senior. Chadwick was dissatisfied with the law that resulted from his report. The Act was passed two years after the Representation of the People Act 1832 which extended the franchise to middle-class men. Some historians have argued that this was a major factor in the PLAA being passed.

The Whigs were a political party in the Parliaments of England, Scotland, Ireland, Great Britain and the United Kingdom. Between the 1680s and the 1850s, the Whigs contested power with their rivals, the Tories. The Whigs merged into the Liberal Party with the Peelites and Radicals in the 1850s. Many Whigs left the Liberal Party in 1886 to form the Liberal Unionist Party, which merged into the Conservative Party in 1912.