The Social Security Act of 1935 is a law enacted by the 74th United States Congress and signed into law by US President Franklin D. Roosevelt. The law created the Social Security program as well as insurance against unemployment. The law was part of Roosevelt's New Deal domestic program.

The 74th United States Congress was a meeting of the legislative branch of the United States federal government, composed of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from January 3, 1935, to January 3, 1937, during the third and fourth years of Franklin D. Roosevelt's presidency. The apportionment of seats in the House of Representatives was based on the 1930 United States census.