6 Music had a total audience of 1.3 million listeners in the three months to March 27, up from 1.14m in the previous quarter, according to the latest data from the Radio Joint Audience Research (RAJAR) board.
Buoyed by shows from high-profile DJs such as Jarvis Cocker, Huey Morgan and Lauren Laverne, 6 Music has also grown its audience from 1.02m in the first quarter of 2010.
Overall, the BBC's radio portfolio reached its highest level since 1999, with 35m people tuning in to BBC stations every week in Q1 2011, up from 34.51m in the previous quarter.
BBC stations had a total audience share of 55%, beating commercial radio's 42.6%, but slightly down from 55.3% in the previous quarter.
Tim Davie, the director of BBC Audio & Music, said: "It is quite brilliant to see radio reaching a record number of listeners in the digital age. These results speak to the unique quality of radio in the UK and reflect our work as an industry to keep innovating to attract new listeners.
"From a BBC perspective, the record results reflect the unique strength of our programme makers and the growing value of distinctive radio stations."
BBC Radio 1 attracted 11.83m listeners per week in the quarter, up from 11.42m in Q4 2010. Its share, at 8.7%, was down on last quarter's 8.8% and last year's 9.5%. The Chris Moyles Show now has 7.52m listeners every week, up from 7.45m in the previous quarter.
BBC Radio 2 grew its audience to 14.54m listeners from last quarter's 13.94m. The station's share, at 16%, was up slightly on 16.2% last quarter, but down from 17.2% last year. The Chris Evans Breakfast Show attracted 9.18m listeners every week, up from 8.72m last quarter.
Over at BBC Radio 3, the music station enjoyed its highest ever listening figures, attracting a weekly audience of 2.26m, up from last quarter's 2.22m. The network's share, at 1.3%, was up from 1.2% last quarter.
BBC Radio 4 also enjoyed its biggest audience under current methodology, attracting 10.83m weekly listeners, up from 10.32m last quarter. Its 12.3% share of all listening was up from 12.1% last quarter. The station's flagship Today programme now has 7.03m listeners per week, up 400,000 quarter-on-quarter.
BBC Radio 7, which was recently rebranded as BBC Radio 4 Extra, had a weekly audience of 1.16m listeners, up from 941,000 last quarter.
The BBC Asian Network, the digital station which was saved from the axe in March, increased its weekly reach to half a million listeners, up from 477,000 in Q4 2010.
BBC World Service recorded a weekly reach of 1.79m, up from last quarter's 1.46m, while BBC Local/Regional radio attracted 10.2m listeners, up from 9.84m last quarter.