ABC Radio Sydney (callsign 2BL) is the flagship station of the ABC Local Radio network in Sydney, Australia. It broadcasts on 702 kHz AM and is one of the oldest radio stations in the country, first going to air in 1923. Originally known as 2SB, it later became 2BL before adopting its current name.

The station provides news, current affairs, talkback programming and entertainment to the Sydney metropolitan area. It features a mix of local Sydney-based shows as well as content shared across the ABC Local Radio network. Popular programs include breakfast, mornings, afternoons and drive-time slots with Sydney-focused content and presenters.

ABC Radio Sydney celebrated its 100th anniversary in November 2023, marking a century of broadcasting to Australia's largest city. The station continues to be one of the top-rated radio stations in the competitive Sydney market, known for its news coverage, discussion of local issues, and connection to the community.