1990

The following is a list of the number-one singles (main sides only) in the U.S. in 1990, based on a comparison between its two main charts at the time, from Billboard and Cash Box magazines.
Issue date 	Song 	Artist(s)
January 6 	"Another Day in Paradise" 	Phil Collins
January 13 	"Another Day in Paradise" 	Phil Collins
January 20 	"Pump Up the Jam" 	Technotronic
January 27 	"How Am I Supposed to Live Without You" 	Michael Bolton
February 3 	"How Am I Supposed to Live Without You" 	Michael Bolton
February 10 	"Opposites Attract" 	Paula Abdul and The Wild Pair
February 17 	"Opposites Attract" 	Paula Abdul and The Wild Pair
February 24 	"Opposites Attract" 	Paula Abdul and The Wild Pair
March 3 	"Dangerous" 	Roxette
March 10 	"Escapade" 	Janet Jackson
March 17 	"Escapade" 	Janet Jackson
March 24 	"Black Velvet" 	Alannah Myles
March 31 	"Black Velvet" 	Alannah Myles
April 7 	"Love Will Lead You Back" 	Taylor Dayne
April 14 	"I'll Be Your Everything" 	Tommy Page
April 21 	"Nothing Compares 2 U" 	Sinéad O'Connor
April 28 	"Nothing Compares 2 U" 	Sinéad O'Connor
May 5 	"Nothing Compares 2 U" 	Sinéad O'Connor
May 12 	"Nothing Compares 2 U" 	Sinéad O'Connor
May 19 	"Vogue" 	Madonna
May 26 	"Vogue" 	Madonna
June 2 	"All I Wanna Do Is Make Love to You" 	Heart
June 9 	"Hold On" 	Wilson Phillips
June 16 	"Hold On" 	Wilson Phillips
June 23 	"It Must Have Been Love" 	Roxette
June 30 	"Step by Step" 	New Kids on the Block
July 7 	"Step by Step" 	New Kids on the Block
July 14 	"Step by Step" 	New Kids on the Block
July 21 	"She Ain't Worth It" 	Glenn Medeiros featuring Bobby Brown
July 28 	"She Ain't Worth It" 	Glenn Medeiros featuring Bobby Brown
August 4 	"Vision of Love" 	Mariah Carey
August 11 	"Vision of Love" 	Mariah Carey
August 18 	"Vision of Love" 	Mariah Carey
August 25 	"Come Back to Me" 	Janet Jackson
September 1 	"If Wishes Came True" 	Sweet Sensation
September 8 	"Blaze of Glory" 	Jon Bon Jovi
September 15	"Release Me" 	Wilson Phillips
September 22	"Release Me" 	Wilson Phillips
September 29	"(Can't Live Without Your) Love and Affection"	Nelson
October 6 	"Praying for Time" 	George Michael
October 13 	"Praying for Time" 	George Michael
October 20 	"I Don't Have the Heart" 	James Ingram
October 27 	"Black Cat" 	Janet Jackson
November 3 	"Ice Ice Baby" 	Vanilla Ice
November 10 	"Love Takes Time" 	Mariah Carey
November 17 	"Love Takes Time" 	Mariah Carey
November 24 	"Love Takes Time" 	Mariah Carey
December 1 	"I'm Your Baby Tonight" 	Whitney Houston
December 8 	"Because I Love You (The Postman Song)" 	Stevie B
December 15 	"Because I Love You (The Postman Song)" 	Stevie B
December 22 	"Because I Love You (The Postman Song)" 	Stevie B
December 29 	"Justify My Love" 	Madonna