CKLN-FM was a community radio station based in Toronto, Ontario, Canada.

From 1983 to 2011, CKLN Radio Inc. was licensed by the Canadian Radio-television and Telecommunications Commission as a campus-community FM radio station affiliated with Ryerson University, and broadcast at 88.1 MHz on the FM dial with the call sign CKLN-FM. It ceased FM broadcasting on April 15, 2011, after its licence was revoked on January 28, 2011 and continued as an internet radio outlet until it ceased operations on December 26, 2011.

In its final months, most of the internet broadcaster's programs were produced in the Regent Park neighbourhood of Toronto. After CKLN was officially dissolved as an organization, its remaining resources and volunteers were transferred to Regent Park Focus Youth Media Arts Centre, which launched Radio Regent, a new Internet radio operation, in early 2012. After a round of licence hearings on new applications for CKLN's old frequency, the CRTC awarded the licence to Rock 95 Broadcasting, which launched CIND-FM under the name Indie 88 in September 2012, while a new campus radio station for Ryerson University was launched as CJRU in 2016.

CKLN began as a closed circuit station set up in 1970 as Ryerson Community Radio, its broadcasts piped to loudspeakers around campus. In 1972, it became independent of Ryerson's Radio and Television Arts department and adopted the call letters CRFM. In 1978, the station adopted the call letters CKLN and was broadcast through campus via closed circuit cable. It was licensed as an over the air FM broadcaster by the CRTC in 1983 as a Ryerson University-based campus-community radio station and assigned the frequency of 88.1 MHz on the FM band and allowed to retain the CKLN call letters. Ryerson had announced that it would close its earlier radio station, CJRT-FM, in 1973 due to financial constraints; that station was saved in 1974 by the Ontario government headed by Bill Davis in 1974 as a government funded public radio station without formal ties to Ryerson.

Among CKLN's early accomplishments was the launch of Ron Nelson's new show The Fantastic Voyage in 1983, Canada's first radio show devoted to Rap. The program was influential in promoting and developing many of Canada's early hip hop stars. According to poet Clifton Joseph, the show was "the single most important agent responsible for the breaking of rap music in Toronto and laying the groundwork for the emergence of Canadian rap artists such as Michie Mee and Maestro Fresh Wes."

Other artists such as Blue Rodeo and k.d. lang received airplay on CKLN prior to being picked up by mainstream radio. The Globe and Mail says of the station that "it sat at the forefront of independent music and radical politics in the city for more than three decades, working with a shoe-string budget, and yet it somehow always managed to survive."

In the 1980s, the station helped create a news service to share content among left-wing stations worldwide including those run by the African National Congress and the FMLN in El Salvador. The station aired live coverage of the release of Nelson Mandela from prison.

CKLN was the first broadcast outlet to air Toronto's Gay Pride Day Parade.