AceShowbiz - Post Malone’s remarkable compilation, The Diamond Collection, has now claimed the top spot on Billboard’s Top Catalog Albums chart for an impressive 20 weeks. This achievement secures its position among albums that have dominated the chart for 18 weeks or more. Released in 2023, this collection celebrates Posty becoming the artist with the highest number of diamond-certified singles by the Recording Industry Association of America.

The Top Catalog Albums chart highlights the most popular catalog albums in the United States. Catalog albums refer to those that are over 18 months old and have dropped below No. 100 on the Billboard 200, along with holiday albums in their second holiday season. This chart made its debut in Billboard on May 25, 1991.

For the initial 18 years following its inception, catalog albums were not eligible for the Billboard 200. However, this policy changed with the Dec. 5, 2009-dated chart. The lifting of catalog restrictions allowed the Billboard 200 to include all top-selling albums in the country, regardless of their age. This adjustment followed the surge in sales of Michael Jackson's catalog after his passing in June 2009. His compilation album, Number Ones, became the best-selling album in six out of the first seven weeks after his death, yet was ineligible for the main chart, marking a significant moment in the history of catalog albums.

Beginning with the issue dated Dec. 13, 2014, Billboard transitioned from relying solely on sales figures to employing a multi-faceted consumption formula that incorporates on-demand streaming as well as digital track sales.

In this article, we will explore the 18 albums that have enjoyed the longest stays at No. 1 on the Catalog Albums chart from 1991 to the present. This diverse collection features a variety of genres, including pop, rock, R&B, rap, country, and even holiday music.

Notably, eight of the albums on this list were released prior to the chart's 1991 launch, showcasing their enduring popularity despite the lack of recognition during the early years.

Here, we present the albums with the most extended runs at No. 1 on the Catalog Albums chart from 1991 to today. Each album's entry includes its release date, the date it first reached No. 1, and its peak position on the Billboard 200.

One standout is Prince's The Very Best of Prince, which enjoyed an impressive run of 18 weeks at No. 1, first hitting the top spot on April 10, 2004. This album uniquely managed to simultaneously secure a No. 1 ranking on both the Billboard 200 and the Catalog Albums chart, marking it as a significant achievement in music history.