The Works Progress Administration (WPA; renamed in 1939 as the Work Projects Administration) was an American New Deal agency, that employed millions of jobseekers (mostly men who were not formally educated) to carry out public works projects, including the construction of public buildings and roads. It was set up on May 6, 1935, by presidential order, as a key part of the Second New Deal.

The WPA's first appropriation in 1935 was $4.9 billion (about $15 dollars per person in the U.S., around 6.7 percent of the 1935 GDP). Headed by Harry Hopkins, the WPA supplied paid jobs to the unemployed during the Great Depression in the United States, while building up the public infrastructure of the US, such as parks, schools, and roads. Most of the jobs were in construction, building more than 620,000 miles (1,000,000 km) of streets and over 10,000 bridges, in addition to many airports and much housing. The largest single project of the WPA was the Tennessee Valley Authority.

At its peak in 1938, it supplied paid jobs for three million unemployed men and women, as well as youth in a separate division, the National Youth Administration. Between 1935 and 1943, the WPA employed 8.5 million people (about half the population of New York). Hourly wages were typically kept well below industry standards.:196 Full employment, which was reached in 1942 and appeared as a long-term national goal around 1944, was not the goal of the WPA; rather, it tried to supply one paid job for all families in which the breadwinner suffered long-term unemployment.:64,184In one of its most famous projects, Federal Project Number One, the WPA employed musicians, artists, writers, actors and directors in arts, drama, media, and literacy projects. The five projects dedicated to these were: the Federal Writers Project (FWP), the Historical Records Survey (HRS), the Federal Theatre Project (FTP), the Federal Music Project (FMP), and the Federal Art Project (FAP). In the Historical Records Survey, for instance, many former slaves in the South were interviewed; these documents are of immense importance to American history. Theater and music groups toured throughout the United States and gave more than 225,000 performances. Archaeological investigations under the WPA were influential in the rediscovery of pre-Columbian Native American cultures, and the development of professional archaeology in the US.

The WPA was a federal program that ran its own projects in cooperation with state and local governments, which supplied 1030% of the costs. Usually, the local sponsor provided land and often trucks and supplies, with the WPA responsible for wages (and for the salaries of supervisors, who were not on relief). WPA sometimes took over state and local relief programs that had originated in the Reconstruction Finance Corporation (RFC) or Federal Emergency Relief Administration programs (FERA).:63 It was liquidated on June 30, 1943, because of low unemployment during World War II. Robert D. Leininger asserted: "millions of people needed subsistence incomes. Work relief was preferred over public assistance (the dole) because it maintained self-respect, reinforced the work ethic, and kept skills sharp.":228

The New Deal was a series of programs, public work projects, financial reforms, and regulations enacted by President Franklin D. Roosevelt in the United States between 1933 and 1939. Major federal programs and agencies included the Civilian Conservation Corps (CCC), the Civil Works Administration (CWA), the Farm Security Administration (FSA), the National Industrial Recovery Act of 1933 (NIRA) and the Social Security Administration (SSA). They provided support for farmers, the unemployed, youth and ,the elderly. The New Deal included new constraints and safeguards on the banking industry and efforts to re-inflate the economy after prices had fallen sharply. New Deal programs included both laws passed by Congress as well as presidential executive orders during the first term of the presidency of Franklin D. Roosevelt.

The programs focused on what historians refer to as the "3 R's": relief for the unemployed and for the poor, recovery of the economy back to normal levels, and reform of the financial system to prevent a repeat depression. The New Deal produced a political realignment, making the Democratic Party the majority (as well as the party that held the White House for seven out of the nine presidential terms from 1933 to 1969) with its base in liberal ideas, the South, big city machines and the newly empowered labor unions, and various ethnic groups. The Republicans were split, with conservatives opposing the entire New Deal as hostile to business and economic growth and liberals in support. The realignment crystallized into the New Deal coalition that dominated presidential elections into the 1960s while the opposing conservative coalition largely controlled Congress in domestic affairs from 1937 to 1964.