1925 in radio

Events

• 1 January - In Sweden, AB Radiotjänst broadcasts its first programme.
• 27 January - Australia's second oldest surviving radio station, 2HD, goes on air for the first time in Newcastle, New South Wales.
• 1 February - The Polish Radiotechnical Society makes its first official broadcast from Warsaw.
• 22 February - First radio transmission of a religious service in Denmark, from the Garrison Church, Copenhagen.
• 4 March - Second inauguration of Calvin Coolidge as President of the United States, the first inauguration to be broadcast.
• 8 March - Westinghouse Electric, owner of KDKA among other stations, announces from its Pittsburgh headquarters a proposal to form "radio networks" via shortwave technology.
• 22 March - JOAK, NHK Radio One of Tokyo, an official inauguration service start, and a first license radio station in Japan.
• 1 April - In Denmark, Radioordningen is established.
• 23 April - KRO is established in the Netherlands.
• 15 May - Reichs-Rundfunk-Gesellschaft established in Berlin as an umbrella organisation by nine German regional broadcasters.
• 1 June - JOBK, NHK Radio One of Osaka, an official inauguration service start in Japan.
• 17 June - In Spain, Unión Radio opens station EAJ-7 Radio Madrid.
• 7 July - Inauguration in France of state radio station Marseille PTT.
• 15 July - JOCK, NHK Radio One of Nagoya, an official inauguration service start in Japan.
• 27 July - The British Broadcasting Company's Daventry transmitting station on Borough Hill, Daventry in central England opens as the world's first longwave broadcast radio transmitter, taking over from its Chelmsford facility.
• 25 September - The Berliner Funkturm begins transmissions.
• 1 November - VARA is established in the Netherlands.
• 16 December - Colombo Radio is launched in Ceylon; the station subsequently becomes known as Radio Ceylon.
• In Norway, broadcasting company Kringkastingsselskapet begins operating from Oslo.

Debuts

• 14 January - First broadcast on Swedish national radio of one of the world's longest-running radio programmes, Barnens brevlåda, which will run for 1,785 editions – all presented by "Uncle Sven" – until 1972.
• 21 March - Lowell Thomas is first heard on the radio on Pittsburgh station KDKA.
• 31 March - Radio station WOWO in Fort Wayne, Indiana begins broadcasting.
• 8 April - Station WADC commences regular programming in Akron, Ohio. It had debuted earlier as a temporary station during a car show held at the Central Garage, the call letters standing for the station's sponsor, the Automotive Dealers Company. Known from 2 June 2005 as WARF, it becomes Akron's oldest surviving radio station.
• 23 September - In Decatur IL, WJBL signs on, now referred to as WSOY.
• 4 October - The Atwater Kent Hour debuts on WEAF and 10 other connected stations.
• 5 October - WSM signs on in Nashville, Tennessee.
• 15 November - First transmission from Radio RV-10 in the Byelorussian Soviet Socialist Republic.
• 28 November - The weekly country music-variety program Grand Ole Opry is first broadcast on WSM radio in Nashville, Tennessee, as the "WSM Barn Dance".
• 24 December - KMOX begins broadcasting in St. Louis, Missouri.

Closings

• April - WGI-Medford Hillside, Massachusetts declares bankruptcy and shuts down for good; this leaves WBZ-Springfield as the oldest surviving station in New England.
• Undated - WAAB 1150 AM ceases broadcasting. 1150 AM will return the next year as WJBO.

Births

• 17 February - Joy Nichols, Australian-born musical comedy performer
• 2 April - Hans Rosenthal, German radio editor, director and media host
• 25 April - Janete Clair, Brazilian broadcast play and novel writer
• 15 May - Regis Cordic, American radio personality and actor
• 25 May - Derek Cooper, English food writer and broadcaster
• 15 June - Richard Baker, English broadcaster
• 7 July - Wally Phillips, American radio personality
• 14 July - Pip Freedman, South African radio comedian and film actor
• 8 September - Peter Sellers, English comic actor
• 19 September - Pete Murray, English DJ
• 22 September - William Franklyn, English actor
• 28 September - Jerry Clower, American country music comedian
• 27 October - Monica Sims, British radio executive
• 31 October - Shirley Dinsdale, American ventriloquist
• 11 November - June Whitfield, English comic actress