Radio 1 may mean:

In radio stations:

• Radio1 Rodos, Greek Radio Station on island of Rhodes. New music, new releases, popular charts
• BBC Radio 1, the British Broadcasting Corporation's popular music radio station
• RTÉ Radio 1, Ireland, the Radio Telefís Éireann's news, current events and talk station
• Radio 1 (Czech Republic), a commercial music radio station based in Prague, focused on non mainstream music
• Radio 1 (Norway), a network of commercial radio stations
• Radio 1 (Netherlands), the news, current affairs and sport station of the Dutch public broadcasters
• CBC Radio One, the Canadian Broadcasting Corporation's news, current events and talk station
• Radio One (New Zealand), a student radio station in Dunedin
• Radio One, a U.S. company that owns radio stations

In other topics:

• "Radio One", a 1969 song on BBC Sessions by the Jimi Hendrix Experience

Radio 1 | Radio 1