List of Hot 100 number-one singles of 1990 (U.S.)

This is a list of the U.S. Billboard magazine Hot 100 number-ones of 1990. The three longest running number-one singles of 1990 are "Nothing Compares 2 U" by Sinéad O'Connor, "Vision of Love" by Mariah Carey, and "Because I Love You (The Postman Song)" by Stevie B, which each attained four weeks at the top of the chart.

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