4ZZZ (pronounced "Four Triple Zed" or simply "Triple Zed") is an independent community radio station operating in Brisbane, Australia at the frequency 102.1 FM. As a community radio station, 4ZZZ is a member of the Community Broadcasting Association of Australia (CBAA). The station broadcasts to much of South East Queensland, parts of northern New South Wales and web streams from its website.

In the 1970s, activists in Queensland were pivotal in establishing Australian community radio amidst a conservative political climate. Australia's first community station, 4ZZZ, launched on December 8, 1975, in Brisbane, aimed to provide a radical alternative to mainstream news, promote community engagement and activism, and support Australian music. The station was the first FM community broadcaster in Brisbane transmitting in stereo. This model inspired other stations across the state. Today, there are 70 community radio stations in Queensland, including Indigenous services. Despite the significant contributions of women, trans, and non-binary individuals, their roles have often been overlooked.

The station's first studios were constructed by announcing staff and volunteers, using second-hand building materials and furniture. The first transmitter was hand built by the station engineer Ross Dannecker with help from Dave Aberdeen. Founders included activist, Jim Beatson, journalist Marian Wilkinson, Arts Administrator, John Stanwell and academic Alan Knight. Announcer John Woods launched the station with The Who's "Won't Get Fooled Again" at Midday 8 December 1975 (a month after The Dismissal). Along with 2JJJ and 3RRR, 4ZZZ has been a major promoter of independent and alternative music providing exposure for many Australian and international artists. Through the late 1970s and early 1980s the station also produced many groundbreaking and award-winning features and documentaries.

On 30 November 1978, the transmitter moved from the University of Queensland student union building to Mount Coot-tha when the station was granted a full licence. At this time, the frequency changed from 105.7 MHz to 102.1 Mhz.

4ZZZ pushed the boundaries by broadcasting illegal obscenities. In 1981 an organisation called "The Society to Outlaw Pornography" reported them to the Australian Broadcasting Authority. 4ZZZ successfully defended themselves, leading to changes which make it legal to swear on Australian TV and radio under certain circumstances.

On 14 December 1988, as part of a conservative backlash to the ousting of Queensland Premier Joh Bjelke-Petersen, 4ZZZ was forced off the air and evicted from its premises at the University of Queensland by the then UQ Union ALSF and Young Nationals student union executive, led by Victoria Brazil. 4ZZZ moved to new premises on Coronation Drive in Toowong. In 1994 the station was able to obtain a loan to buy the former headquarters of the Communist Party of Australia. 4ZZZ still broadcasts from these premises on Barry Parade in Fortitude Valley.

The motto for the station is agitate, educate, organise. (The saying dates from New York in the early 1880s.) They aim to "Provide a voice for marginalised communities" -

The station's volunteers have won many awards including Community Broadcasting Association of Australia awards and national media awards.