The fireside chats were a series of evening radio addresses given by Franklin D. Roosevelt, the 32nd President of the United States, between 1933 and 1944. Roosevelt spoke with familiarity to millions of Americans about recovery from the Great Depression, the promulgation of the Emergency Banking Act in response to the banking crisis, the 1936 recession, New Deal initiatives, and the course of World War II. On radio, he quelled rumors, countered conservative-dominated newspapers, and explained his policies directly to the American people. His tone and demeanor communicated self-assurance during times of despair and uncertainty. Roosevelt was regarded as an effective communicator on radio, and the fireside chats kept him in high public regard throughout his presidency. Their introduction was later described as a "revolutionary experiment with a nascent media platform."

The series of chats were among the first 50 recordings made part of the National Recording Registry of the Library of Congress, which noted it as "an influential series of radio broadcasts in which Roosevelt utilized the media to present his programs and ideas directly to the public and thereby redefined the relationship between President Roosevelt and the American people in 1933."

It cannot misrepresent or misquote. It is far-reaching and simultaneous in releasing messages given for transmission to the nation or for international consumption.

— Stephen Early, Roosevelt's press secretary, on the value of radio

Roosevelt believed that his administration's success depended upon a favorable dialogue with the electorate, possible only through methods of mass communication, and that it would allow him to take the initiative. The use of radio for direct appeals was perhaps the most important of Roosevelt's innovations in political communication. Roosevelt's opponents had control of most newspapers in the 1930s and press reports were under their control and involved their editorial commentary. Historian Betty Houchin Winfield says, "He and his advisers worried that newspapers' biases would affect the news columns and rightly so." Historian Douglas B. Craig says that Roosevelt "offered voters a chance to receive information unadulterated by newspaper proprietors' bias" through the new medium of radio.

Roosevelt first used what would become known as fireside chats in 1929 as Governor of New York. Roosevelt was a Democrat facing a conservative Republican legislature, so during each legislative session he would occasionally address the residents of New York directly. His third gubernatorial address—April 3, 1929, on WGY radio—is cited by Roosevelt biographer Frank Freidel as being the first fireside chat.

As president, Roosevelt began making the informal addresses on March 12, 1933, eight days after his inauguration. He had spent his first week coping with a month-long epidemic of bank closings that was hurting families nationwide. He closed the entire American banking system on March 6. On March 9, Congress passed the Emergency Banking Act, which Roosevelt used to effectively create federal deposit insurance when the banks reopened. At 10 p.m. ET that Sunday night, on the eve of the end of the bank holiday, Roosevelt spoke to a radio audience of more than 60 million people, to tell them in clear language "what has been done in the last few days, why it was done, and what the next steps are going to be".

The result, according to economic historian William L. Silber, was a "remarkable turnaround in the public's confidence...The contemporary press confirms that the public recognized the implicit guarantee and, as a result, believed that the reopened banks would be safe, as the President explained in his first Fireside Chat." Within two weeks people returned more than half of the cash they had been hoarding, and the first stock-trading day after the bank holiday marked the largest-ever one-day percentage price increase.