The Liberal welfare reforms (1906–1914) were a series of acts of social legislation passed by the Liberal Party after the 1906 general election. They represent the emergence of the modern welfare state in the United Kingdom. The reforms demonstrate the split that had emerged within liberalism, between emerging social liberalism and classical liberalism, and a change in direction for the Liberal Party from laissez-faire traditional liberalism to a party advocating a larger, more active government protecting the welfare of its citizens.

The Liberal Party was one of the two major political parties in the United Kingdom, along with the Conservative Party, in the 19th and early 20th centuries. Beginning as an alliance of Whigs, free trade-supporting Peelites, and reformist Radicals in the 1850s, by the end of the 19th century, it had formed four governments under William Gladstone. Despite being divided over the issue of Irish Home Rule, the party returned to government in 1905 and won a landslide victory in the 1906 general election.