The CHUM Chart was a ranking of top 30 (and, until August 1968, the top 50) songs on Toronto, Ontario radio station CHUM 1050 AM

CHUM (AM)

CHUM, branded as TSN Radio 1050, broadcasting at 1050 kHz in the AM band, is a Canadian radio station licensed to Toronto, Ontario. The station is owned and operated by Bell Media....

, from 1957 to 1986, and was the longest-running Top 40 chart in the world produced by an individual radio station. In the early 2000s, sister station 104.5 CHUM FM

CHUM-FM

CHUM-FM is a Canadian radio station licensed to Toronto, Ontario and operated by Bell Media. It broadcasts at 104.5 MHz with a hot adult contemporary format that leans towards rhythmic adult contemporary...

, which airs a hot adult contemporary format, revived the CHUM Chart name for a new countdown show.

The CHUM Chart also aired as a television program on Citytv

CITY-TV

CITY-DT, Channel 57 , is a television station based in Toronto, Ontario, Canada owned and operated by Rogers Media...

 every Saturday at 2:00 p.m until January 2008, when the show was discontinued after Rogers Communications

Rogers Communications

Rogers Communications Inc. is one of Canada's largest communications companies, particularly in the field of wireless communications, cable television, home phone and internet with additional telecommunications and mass media assets...

 gained control of the Citytv stations and replaced it with the JackNation chart, a show based on their Jack FM

Jack FM

JACK FM is the alternative name and on-air brand of 60 radio stations in Canada, the United States, the United Kingdom, and Russia. Jack stations play a mix of 1960s, 1970s, 1980s, and 1990s hits with some current hot adult contemporary singles. Jack's slogan "playing what we want" can also be...

 radio brand.