List of Billboard number-one singles of the 1940s

This article is about the US number-one songs chart held during the 1940s.
"Billboard" number-one singles chart (which preceded the Billboard Hot 100 chart), which was updated weekly by the "Billboard" magazine, was the main singles chart of the American music industry since 1940 and until the Billboard Hot 100 chart was established in 1958.
Before the Billboard Hot 100 chart was established (in August 1958), which would solely be based on the sales data and airplay on American radio stations, the "Billboard" magazine used to published several weekly charts every time. Throughout most of the 1950s the magazine published the following three charts:
The list below includes the "Best Sellers in Stores" singles chart only (for the expanded detailed lists of the three charts, see articles of individual years in the Billboard charts).
Statistics by decade.
By artist.
The following artists achieved four or more number-one hits during the 1940s. A number of artists had number-one singles on their own as well as part of a collaboration.
Artists by total number of weeks at number-one.
The following artists were featured in top of the chart for the highest total number of weeks during the 1940s.
Songs by total number of weeks at number-one.
The following songs were featured in top of the chart for the highest total number of weeks during the 1940s.