The Agricultural Adjustment Act (AAA) of 1933 was a United States federal law of the New Deal era designed to boost agricultural prices by reducing surpluses. The government bought livestock for slaughter and paid farmers subsidies not to plant on part of their land. The money for these subsidies was generated through an exclusive tax on companies that processed farm products. The Act created a new agency, the Agricultural Adjustment Administration, also called "AAA" (1933–1942), an agency of the U.S. Department of Agriculture, to oversee the distribution of the subsidies. The Agriculture Marketing Act, which established the Federal Farm Board in 1929, was seen as an important precursor to this act. The AAA, along with other New Deal programs, represented the federal government's first substantial effort to address economic welfare in the United States.

When President Franklin D. Roosevelt took office in March 1933, the United States was in the midst of the Great Depression. "Farmers faced the most severe economic situation and lowest agricultural prices since the 1890s." "Overproduction and a shrinking international market had driven down agricultural prices." Soon after his inauguration, Roosevelt called the Hundred Days Congress into session to address the crumbling economy. From this Congress came the Agricultural Adjustment Administration, to replace the Federal Farm Board. The Roosevelt Administration was tasked with decreasing agricultural surpluses. Wheat, cotton, field corn, hogs, rice, tobacco, and milk and its products were designated as basic commodities in the original legislation. Subsequent amendments in 1934 and 1935 expanded the list of basic commodities to include rye, flax, barley, grain sorghum, cattle, peanuts, sugar beets, sugar cane, and potatoes. The administration targeted these commodities for the following reasons:

"The goal of the Agricultural Adjustment Act, restoring farm purchasing power of agricultural commodities or the fair exchange value of a commodity based upon price relative to the prewar 1909–14 level, was to be accomplished through a number of methods. These included the authorization by the Secretary of Agriculture (1) to secure voluntary reduction of the acreage in basic crops through agreements with producers and use of direct payments for participation in acreage control programs; (2) to regulate marketing through voluntary agreements with processors, associations or producers, and other handlers of agricultural commodities or products; (3) to license processors, association, and others handling agricultural commodities to eliminate unfair practices or charges; (4) to determine the necessity for and the rate or processing taxes; and (5) to use the proceeds of taxes and appropriate funds for the cost of adjustment operations, for the expansion of markets, and for the removal or agricultural surpluses."

"Congress declared its intent, at the same time, to protect the consumers interest. This was to be done by readjusting farm production at a level that would not increase the percentage of consumers' retail expenditures above the percentage returned to the farmer in the prewar base period."

The juxtaposition of huge agricultural surpluses and the many deaths due to insufficient food shocked many, as well as some of the administrative decisions that happened under the Agricultural Adjustment Act. For example, in an effort to reduce agricultural surpluses, the government paid farmers to reduce crop production and to sell pregnant sows as well as young pigs. Oranges were being soaked with kerosene to prevent their consumption and corn was being burned as fuel because it was so cheap. There were many people, however, as well as livestock in different places starving to death. Farmers slaughtered livestock because feed prices were rising, and they could not afford to feed their own animals. Under the Agricultural Adjustment Act, "plowing under" of pigs was also common to prevent them reaching a reproductive age, as well as donating pigs to the Red Cross.

In 1935, the income generated by farms was 50 percent higher than it was in 1932, which was partly due to farm programs such as the AAA.

Tenant farming characterized the cotton and tobacco production in the post-Civil War South. As the agricultural economy plummeted in the early 1930s, all farmers were badly hurt but the tenant farmers and sharecroppers experienced the worst of it.

To accomplish its goal of parity (raising crop prices to where they were in the golden years of 1909–1914), the Act reduced crop production. The Act accomplished this by offering landowners acreage reduction contracts, by which they agreed not to grow cotton on a portion of their land. By law, they were required to pay the tenant farmers and sharecroppers on their land a portion of the money; but after Southern Democrats in Congress complained, the Secretary of Agriculture surrendered and reinterpreted section 7 to no longer send checks to sharecroppers directly, hurting the tenants. The farm wage workers who worked directly for the landowner suffered the greatest unemployment as a result of the Act. There are few people gullible enough to believe that the acreage devoted to cotton can be reduced one-third without an accompanying decrease in the laborers engaged in its production. Researchers concluded that the statistics after the Act took effect "indicate a consistent and widespread tendency for cotton croppers and, to a considerable extent, tenants to decrease in numbers between 1930 and 1935. The decreases among Negroes were consistently greater than those among whites." Another consequence was that the historic high levels of mobility from year to year declined sharply, as tenants and croppers tended to stay longer with the same landowner.