Magic's audience of 2.05 million was down 4.6% quarter-on-quarter, but up 12.6% year-on-year, according to the latest RAJAR data published today. The station had a 6.3% share of the market, leading the way among commercial stations in the capital.
Dance station Kiss, also owned by Bauer Media, saw its audience increase 13.5% year-on-year to 1.82m, with a 5% share of all listening. In contrast, Heart was down 14.1% quarter-on-quarter and 6.1% year-on-year to 1.76m, with a 4.6% share of the market.
Global's 95.8 Capital FM also shed listeners, down 7.7% on the previous quarter to 1.96m. Capital had a 4.5% share of the market, just behind Heart.
"Commercial radio is in great shape and continuing to attract listeners away from the BBC," said Dee Ford, Bauer Radio group managing director.
"Over 13 million people trust Bauer Radio every week to deliver a compelling mix of music and entertainment that they are passionate about - from Southampton to Inverness and from Belfast to Hull.
"Special congratulations must go to Magic 105.4, which has again been crowned the number one station in London - ahead of Radio 1, Radio 2 and gaining more share over Capital and Heart. A great performance."
Johnny Vaughan and Lisa Snowdon's Capital FM breakfast show had an audience of 1.08m, down 150,000 listeners year-on-year. However, it remained the top commercial breakfast programme.
Heart's breakfast show, presented by Jamie Theakston and Harriet Scott, slipped from second to fourth after losing around 100,000 listeners on the previous quarter to 728,000.
Theakston and Scott were overtaken by Magic's Neil Fox, who attracted 66,000 listeners on the previous quarter to 853,000. Kiss's Rickie, Melvin and Charlie came in third with 777,000, up 108,000 on the previous quarter.
Among the national commercial stations, the main Absolute Radio station had an average weekly reach of 1.37m listeners in the final quarter of last year, down 16.9% quarter-on-quarter and 7.9% year-on-year.
However, digital spinoff station Absolute 80s grew its audience by 17.9% on the previous quarter to 665,000, while Absolute Radio 90s was up 45.3% to 295,000.
Global Radio's Classic FM was up 11.4% year-on-year to 5.72m, while the Heart network of stations grew 6.7% year-on-year to 7.746 million.
Bauer Media's The Hits remained the most popular digital station with 1.12m, while digital station Planet Rock was up 18.5% year-on-year to an all-time high of 827,000.