As of the issue for the week ending on May 10, 2017, the Billboard Hot 100 has had 1,065 different number one hits.
On August 4, 1958, Billboard premiered one main all-genre singles chart: the Hot 100, with "Poor Little Fool" by Ricky Nelson its first No
== Compilation ==The tracking week for sales, streaming and airplay begins on Friday and ends on Thursday (airplay used to have a tracking week from Monday to Sunday, but effective with the chart dated July 17, 2021, the week was adjusted to align with the other two metrics)

