The start of commercial radio depends on how someone defines the word 'commercial.'

Many scholars consider the first commercial radio broadcast to be during the 1920 presidential election

On Nov. 2, Pittsburgh, Pennsylvania, station KDKA broadcast the results of the presidential election. Leo Rosenberg delivered the news that Warren Harding had won in a landslide to an audience of around 100 people.

See a timeline of commercial radio history

Radio, as we know it, began in the 1910s. This FCC timeline traces the evolution of the medium over the century that followed, highlighting groundbreaking broadcasts, speeches, and technological breakthroughs.

Before radio jingles arrived in the 20th century, advertisers used poetry to sell their products.

When a radio company was the biggest tech stock around

The Radio Corporation of America was the biggest stock during the 1920s. Originally called Marconi Wireless, the company transformed radio technology. The company pioneered broadcasting, created NBC, and became a tech giant. After remarkable growth and challenges, RCA was acquired by General Electric in 1986, marking the end of its 67-year independent existence.

Calvin Coolidge brought the State of the Union to the radio age

On Dec. 6, 1923, President Coolidge delivered his Annual Message from the US House chamber as millions listened by radio—crowds gathered outside with amplifiers—making it the first nationally broadcast address and the only in-person State of the Union of his presidency.

Radio quiz shows took off in the '40s

The concept took hold during the Great Depression, with 50 shows on the air by 1940, because they allowed families to imagine a financial windfall was just a few questions away. Although the genre had a slight downturn during World War II, it experienced a resurgence by the end of the decade, with 200 shows on the air.

Franklin D. Roosevelt used radio to connect directly with Americans through his 'Fireside Chats'

Beginning in 1933, FDR harnessed the new medium of radio to explain policies and reassure the public during the Great Depression and World War II. His conversational fireside chats revolutionized presidential communication.

Guglielmo Marconi overshadowed Nikola Tesla through commercialization

Despite Tesla envisioning wireless power and communication earlier, Marconi developed practical implementations of wireless communication, including transmitting the first transatlantic radio signal. The technology, which facilitated telegraphy critical for warships and navies, earned Marconi the 1909 Nobel Prize in physics.

The first nationally broadcast soap opera was 'Clara, Lu, 'n Em'

The show first aired in Chicago in 1930, but was then picked up by NBC and broadcast across the country in 1931. The show followed three women who lived in the same duplex. Listen to a 1934 episode below, including the preshow's soap-centric advertising.

Hear Roosevelt's first 'Fireside Chat'

The president's casual radio addresses ditched the language of sloganeering and politiciking, intentionally framing the broadcasts as conversational explanations of current events and politics. The inaugural episode was broadcast in 1933, during the Great Depression, and outlined his plans to restore faith in the banking system.

How underground radio revitalized rock 'n' roll

Early FM was a wasteland and quickly became the domain of amateurs and risk-takers, including many stations and DJs who played music that flew in the face of mainstream trends. This history of the band's scrappy beginnings unpacks how it realigned the rock charts.

Why Edwin Armstrong developed FM radio

AM radio was popular but prone to interference and static, which could be frustrating for listeners. In 1933, Armstrong, a Columbia University professor, discovered that a clearer signal could be broadcast by revising how it was captured.

The disputed inventor of the radio

Guglielmo Marconi was awarded the 1909 Nobel Prize in physics for inventing the wireless telegraph, which used radio waves to transmit Morse code. Nikola Tesla, however, was experimenting with radio waves in the 1890s, though much of his work was destroyed in a 1895 fire.

The network’s early days were focused on movies and sports

HBO launched in 1972, with an initial focus on commercial-free movies and sports events. The network’s first-ever broadcast was an NHL game between the New York Rangers and the Vancouver Canucks, signaling its commitment to premium, live content.

The modern quiz show debuted in 1926

“The Brooklyn Daily Eagle on Current Events” was a radio show on New York’s WNYC. The Brooklyn Daily Eagle was a local newspaper, providing an air of authority to the format, with the paper’s associate editor acting as quizmaster.

Orson Welles' 1938 broadcast of 'War of the Worlds' invoked real panic

The raconteur's teleplay of HG Wells' 1898 science fiction novel presented the plot as a news broadcast, leading some listeners to believe that New Jersey was being invaded by Martians. This retrospective from the National Endowment for the Humanities unpacks how he made it happen, and the media fallout that ensued.

Marie Curie pioneered radioactivity research, for which she won two Nobel Prizes

Marie Curie and her husband isolated polonium and radium despite poor lab conditions and financial hardship. President Harding, on behalf of the women of America, presented her with one gram of radium in 1921 in recognition of her service to science.

In 1938, 1.7 million people were fooled into believing a Martian invasion was underway because of a radio play

Orson Welles' realistic radio dramatization of a Martian invasion of Earth, called "The War of the Worlds," caused quite a stir with audiences. The broadcast resulted in panic, with some people in the area where the story took place attempting to flee. It also helped Welles secure a contract with a Hollywood studio, leading to the creation of "Citizen Kane."

A DJ helped popularize the term 'rock 'n' roll' to resell rhythm and blues to a broad audience.

Soap operas earned their name thanks to the sponsorships of soap brands

Many early 20th-century radio programs for women were sponsored by brands that introduced each new episode. Because these dramas were aimed at women, many of their sponsors were for household products, like soap. The association led some to refer to the shows as "soap operas," a title that stuck.

1 in 5 Americans get local news from the radio

According to a 2023 Pew Research Center report, radio remains the second most popular medium for local news, remaining a vital source for local concerns. Audiences for national public radio, however, have declined, with listenership for NPR-affiliated stations down 10%.

Despite the popularity of podcasts, most US adults still listen to radio

A 2026 survey found that 84% of adults aged 25-64 report listening to the radio weekly. That's more than double the number of those who listen to podcasts.

Listen to the history of the first banner ad on the internet, which went live on Oct. 27, 1994, on HotWired.com and pioneered the modern concept of digital advertising.

The opposition party to the president first delivered a televised response in 1966

Television networks first granted airtime to the out-of-power party in 1966, with Republicans Everett Dirksen and then-Representative Gerald R. Ford delivering the inaugural response. See a list of each opposition response to the State of the Union since then.

The Kennedy-Nixon debates marked the presidency's entry into the television era

In 1960, John F. Kennedy and Richard Nixon faced off in the first televised presidential debates. Kennedy's calm, telegenic presence contrasted with Nixon's uneasy appearance, showing how the new medium could shape voter perceptions and modern campaign strategy.

Before he was known as a folk singer, Woody Guthrie was a popular radio host in Los Angeles.

'Vox Pop' gave ordinary contestants the chance to win quick cash

The radio show began in 1932 with man-on-the-street interviews in Houston, but soon began traveling to different locations around the country. The show became known for its quiz feature, which offered $1 for each question randomly picked people answered correctly. The show was a hit, not only because audiences could imagine themselves in the contestants’ shoes, but also because it was relatively inexpensive for the network to produce.

'The Grand Ole Opry' radio show debuted in 1925

The Grand Ole Opry began as "The WSM Barn Dance," broadcasting from downtown Nashville. The name changed when its host, transitioning from the station's previous program, said, "You've been up in the clouds with Grand Opera; now get down to earth with us in a shindig of Grand Ole Opry!"

A government mandate changed the sound of Canadian radio

In 1971, Canadian radio stations were required to ensure their programming included at least 30% Canadian artists. The impact was both cultural and commercial, with Canadian artists gaining more visibility at home and Canadian studios and songwriters earning more pay.

Thomas Edison publicly executed animals with AC to convince the public of its dangers

J.P. Morgan first backed Thomas Edison's direct current system, seeing electricity's potential to usurp John D. Rockefeller's kerosene empire. Despite the investments and smear campaign against alternating current, alternating current ultimately won public support after lighting the 1893 World's Fair, after which Morgan would fund Tesla's wireless transmission tower.

A map of religious radio stations in the US

A Pew analysis of 440,000 hours of broadcasts found more than 4,000 faith-based AM/FM stations reach 98% of American adults (out of a total of 17,000 licensed stations). Ownership is highly concentrated, with the top 30% of stations belonging to large groups; Educational Media Foundation's K-LOVE and Air1 networks alone hold hundreds of licenses nationwide.

'Truth or Consequences' was the first TV quiz show

The game—which forced contestants who answered questions incorrectly to face "consequences" in the form of wacky stunts—debuted in 1941 with a one-off experimental broadcast on WNBT, then reappeared on NBC in 1950. In 1956, a fresh-faced Bob Barker made his television debut as the show's new host.

'Livery Stable Blues' was the first jazz recording and helped popularize the genre

The 1917 song by the Original Dixieland Jass Band was the first jazz recording to be issued and put the New Orleans sound on the national stage, along with inspiring several soundalikes.

The story of the first commercial US oil well and why crude oil is measured in barrels

The 1859 oil discovery in Titusville, Pennsylvania, sparked a boom in oil exploration and production to meet the demand for kerosene lamp fuel. Because the 42-gallon barrel was a readily available container already in use for shipping fish, butter, wine, and other goods, it was adopted by the Petroleum Producers Association in 1872 and by both the US Geological Survey and the US Bureau of Mines in 1882.

Hamilton founded what many regard as the first commercial bank in the United States

In 1784, Alexander Hamilton helped found the Bank of New York, which initially operated without a charter, financed early federal operations, provided what is considered the US government's first loan, and became the first stock traded on the New York Stock Exchange.

Hear the story of the first paramedic services, which grew out of a community training program in 1960s Pittsburgh.

Carlin's 'Seven Words' led to a landmark Supreme Court ruling

The original recording of Carlin's bit aired on a New York radio station in 1973, leading to an FCC complaint. The case went up to the Supreme Court, which ruled that the FCC had the right to penalize broadcasters that aired obscene content during the daytime.

Rockwell's 'Four Freedoms' raised millions for the US war effort

Rockwell initially pitched the "Four Freedoms" project to the US Ordnance Department, but was rejected. Rockwell's editor at the Saturday Evening Post, however, loved the idea and published the images across four consecutive issues. After they became a sensation, the Saturday Evening Post partnered with the US Department of the Treasury to send the paintings on a 16-date national tour, which raised $133M in war bonds and stamps. Meanwhile, the Office of War Information printed four million sets of the posters with "Buy War Bonds" emblazoned on them.

Bob Hope's radio shows brought stand-up to the masses

Bob Hope’s 1930s variety shows featured comedic monologues. Unlike the tightly scripted and evergreen sets of vaudeville, Hope’s monologues leaned into topical and political humor, sometimes to the disapproval of his network.

After World War I, consumerism began to usurp frugality as a foundational value in American life and culture.

James Garfield's 79-day decline hooked America on news updates

After he was shot while departing Washington, DC, in 1881, the president was treated for his wounds and cared for at the White House. Since 1861, telegraphs had spanned the continent, and the Associated Press pooled sources to share telegraph news. The public, seeking updates on the president's condition, was able to receive them regularly for the first time due to this network, laying the foundation for the continuous news cycle.

How Lyndon Johnson created public radio

The Public Broadcasting Act of 1967, part of the president's Great Society plan, established the Corporation for Public Broadcasting, which later led to the incorporation of National Public Radio. Originally, the bill was intended solely to establish public television; before Johnson signed the act, slips of paper reading "and radio" were literally Scotch-taped next to each mention of "television."

A 1973 ad is credited with accelerating the Super Bowl advertising craze

The Super Bowl’s history as an advertising phenomenon began in earnest during the 1970s. In 1973, for instance, Joe Namath and Farrah Fawcett starred in Noxzema’s “Cream Your Face” ad, which Smithsonian Magazine says helped establish the game “as an event for advertisers.” Read this article to learn more about how the Super Bowl became advertising’s, well, Super Bowl.

Sputnik 1—launched in 1957—was Earth's first artificial satellite

Its launch accelerated US investment in the Space Race amid fears the Soviet Union had the technology to launch intercontinental nuclear warheads. It would be followed by Sputnik 2, which carried the first living being—a dog named Laika—to orbit.

Joseph Kennedy Sr., President John F. Kennedy's father, became the first chairman of the Securities Exchange Commission in 1934.

'The Grand Ole Opry' turned Nashville into the country music capital

By 1932, country was being broadcast to 30 states and parts of Canada. That influence turned the Tennessee city into a destination for those interested in working in the budding industry.

The first song delivered by a podcast was the Grateful Dead's 'Truckin.''

The history of the North American power grid, which is composed of five major grids

Thomas Edison's Pearl Street Station was the first US commercial power plant, burning coal to power lamps for some Manhattan residents. Over time, local power plants would be bought out by larger ones, forming interconnected systems spanning multiple states. Today, the Eastern Interconnection and Western Interconnection are the largest of these systems.

Advertising powerhouse Mary Wells Lawrence became the first female CEO of a public company listed on the NYSE when her ad agency went public in 1968.

Pizza didn't take off in the US until after World War II, likely because of technological advancements and soldiers' exposure to it abroad.