The Advertiser is the only local daily newspaper published in Adelaide, South Australia. First published on July 12, 1858, the paper has one of the highest circulations in Australia.

Between 1893 and 1929, John Langdon Bonython was the sole proprietor, who made the newspaper one of the most prominent in Australia. He supported the movement towards the Federation of Australia. In addition to the various places in Adelaide, the Canberra suburb of Bonython, Australian Capital Territory was named in his honour in recognition of his support for Federation.

Historically, The Advertiser took a centrist to centre-left editorial line on most issues, however, upon its takeover by News Corporation in 1990, the editorial line has become far more conservative, much like the former The News (Adelaide) with which it was effectively merged. Since the death of The News , The Advertiser has become a tabloid newspaper and has vastly shifted its audience.

As Adelaide now lacks a daily centre-left broadsheet, and as a result, the interstate Fairfax newspapers, The Sydney Morning Herald and The Age have become popular, despite being published and aimed at an audience in Sydney and Melbourne respectively. Recently, the centre-left weekly broadsheet The Independent Weekly began publication in Adelaide, but is not considered a significant competitor.

The Saturday edition is called The Saturday Advertiser and the Sunday sister publication is known as the Sunday Mail .

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