List of Billboard 200 number-one albums of 2003

The highest-selling albums and EPs in the United States are ranked in the Billboard 200, published by Billboard magazine. The data are compiled by Nielsen Soundscan based on each album's weekly discrete and download sales.

In 2003, 34 different albums reached the #1 spot on the Billboard 200. Get Rich or Die Tryin' by the American rapper 50 Cent spent the longest time at #1, with 6 non-consecutive weeks at the top of the albums list. It also became the best performing album of 2003.