List of Billboard Hot 100 chart achievements and milestones

The Billboard Hot 100 is a singles chart published by Billboard which measures the most popular singles in the United States. Prior to the creation of the Hot 100, Billboard published four singles charts: "Best Sellers in Stores", "Most Played by Jockeys", "Most Played in Jukeboxes" and "The Top 100". These charts, which ranged from 20 to 100 slots, were phased out at different times between 1957 and 1958. Though technically not part of the Hot 100 chart history, select data from these charts are included for computational purposes, and to avoid unenlightening or misleading characterizations. Throughout the history of the Hot 100 and its predecessor charts, many songs have set records for longevity, popularity, or number of hit singles by an individual artist. Among these records is the longest-running number one single "Old Town Road" by Lil Nas X, which spent 19 weeks at that position. The Beatles have the most number one hits on the chart, with 20 songs having reached that position.