1923 in radio details the internationally significant events in radio broadcasting for the year 1923.

• 1 January – In the United States the American Football Rose Bowl Game is broadcast for the first time, on Los Angeles station KHJ.
• 4 January – The first network broadcast is made when WEAF in New York City and WNAC in Boston simultaneously broadcast a saxophone solo.^[1]
• 8 January – First outside broadcast by the British Broadcasting Company: a British National Opera Company production of The Magic Flute from the Royal Opera House, Covent Garden.
• 18 January – The United Kingdom Postmaster General grants the BBC a licence to broadcast.
• 20 January – Inauguration of Paris PTT, a station organized by and broadcasting from the École supérieure des postes et télégraphes (the French post office's higher educational institute of engineering).
• 8 February – Norman Albert calls the first live broadcast of an ice hockey game, the third period of an Ontario Hockey League Intermediate playoff game, on Toronto radio station CFCA.^[2][3]
• 13 March – Production of the first radio set incorporating a loudspeaker. All previously produced sets have required the use of headphones.^{[citation needed]}
• 14 March – Pete Parker calls the play-by-play of the first ice hockey game ever broadcast on the radio in its entirety, between the Regina Capitals and the Edmonton Eskimos of the Western Canada Hockey League.^[4]
• 1 April – In Vienna the Czeija & Nissl electrical company begins test transmissions from its premises in co-operation with a technical high school, the Technisches Gewerbemusem. This marks the start of radio broadcasting in Austria.
• 18 May – The first regular radio broadcasts begin in Czechoslovakia.^[5]
• 1 June – The publicly owned Canadian National Railways establishes the CNR Radio network to supply programming on its fleet of passenger cars; it is the first national network in North America and precursor to the Canadian Broadcasting Corporation.
• 21 July – The Dutch radio manufacturing company Nederlandsche Seintoestellen Fabriek begins regular radio broadcasting in the Netherlands.
• 28 September – First publication of the BBC listings magazine, Radio Times, in Britain.^[6]
• 29 October – Regular radio broadcasting in Germany officially begins with the first evening transmission from the Sendestelle Berlin installed at the Vox-Haus in Potsdamer Platz.^[7][8]
• 8 November – First BBC broadcast in Welsh^[9]
• 13 November – Australia's first licensed radio station, 2SB, begins transmission in Sydney.
• 23 November – In Belgium, French-speaking station Radio Bruxelles begins broadcasting (it will change its name to Radio Belgique on 1 January 1924).
• 2 December – First BBC broadcast in Gaelic^[9]
• 31 December
  • KDKA in Pittsburgh conducts the first transcontinental voice broadcast with a station in Manchester, England.^[10]
  • The BBC broadcasts the chimes of Big Ben from London for the first time.^[6]

• 22 March – Hockey Night in Canada is first broadcast on the Toronto Star's private station CFCA.

• 26 January – Patricia Hughes, English continuity announcer (died 2013)
• 2 March – Jean Metcalfe, English radio broadcaster (died 2000)
• 9 May – Johnny Grant, American radio host and producer (died 2008)
• 10 October – Nicholas Parsons, British entertainer (died 2020)
• 21 November – Margaret Lyons, born Keiko Margaret Inouye, Canadian broadcast executive (died 2019)
• 22 December – John Ebdon, British radio broadcaster, Graecophile, author and director of the London Planetarium (died 2005)
• 25 December – Gordon Baxter, American radio personality, author and columnist (died 2005)