CKBY is a Canadian radio station, which airs a country music format at 101.1 FM in Smiths Falls and Ottawa, Ontario. The station is owned by Rogers Communications, and uses the brand name Y101.
The station was launched in 1969 as CJET-FM, a sister station to the AM radio station CJET, and changed its callsign to CKUE in the early 1970s.
In 1984, the stations were acquired by CHEZ-FM Inc., the owner of Ottawa's CHEZ. In 1986, CKUE changed its callsign to CHEQ.
In 1993, CHEZ acquired rights to the callsign and format of CFMO, an easy listening station in Ottawa which CHUM Limited had converted to hot adult contemporary CKKL.
In 1999, the CHEZ group of stations were acquired by Rogers Communications. At the end of the year, Rogers converted the station to a modern rock format, using the callsign CIOX and the brand name Xfm. The station's facilities were moved into Ottawa, and in 2001, the CRTC found that by operating CIOX as an Ottawa station, Rogers was in contravention of market concentration rules about the number of radio stations in a single market that can be owned by the same company. As a result, the CRTC ordered Rogers to return the station to Smiths Falls.
On January 9, 2004, the station adopted its current format when Rogers converted the former CKBY in Ottawa to the current CISS. 101.1 became CKBY, and 105.3 became CISS a month later after the format change.