Janet Jackson (pictured) earned her second Hot 100 number-one single with "Miss You Much", which stayed at the top position for four straight weeks.
These are the Billboard Hot 100 number-one singles of 1989. The two longest running number-one singles of 1989 are "Miss You Much" by Janet Jackson and "Another Day in Paradise" by Phil Collins, which each charted at number one for four weeks. "Another Day in Paradise" attained two weeks at number one in 1989 and two more weeks in 1990, achieving four weeks at the top. 1989 ties with 1988 by having the second most number-one hits with 32 songs going to number one during the year.
An asterisk (*) by a date indicates an unpublished, "frozen" week, due to the special double issues that Billboard published in print at the end of the year for their year-end charts.
^DeKnock, Jan (1989-06-23). "Richard Marx Keeps Success in the Family as 'Satisfied' Leaps to No. 1". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-08-18). "Chicago Native Richard Marx Enjoys Another Week at the Top on 2 Lists". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-08-25). "Richard Marx's 'Right Here Waiting' Shows Unusual Power at the Top". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-09-01). "'Cold Hearted,' Paula Abdul's 3d Straight No. 1, Heats Up Singles Chart". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-09-08). "New Kids on the Block Hang Tough to Claim No. 1 Pop Single, Album". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-09-22). "London-based Milli Vanilli Hits a Double with No. 1 Pop Single, Album". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-09-29). "Milli Vanilli Scores a Second Chart Double by Hanging on to No. 1 Spots". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-10-06). "Paula Abdul's 'Forever Your Girl' Took Almost Forever to Make No. 1". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-10-13). "Heavy Metal Rises to Top of LP List with Motley Crue's 'Dr. Feelgood'". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-10-20). "Janet Jackson Still Dancing in Spotlight with Hot Numbers on the Lists". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-11-24). "3d Straight No. 1 and Another Double for the Amazing Duo Milli Vanilli". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-12-08). "Billy Joel's 'Fire' is One of Only a Few to Reach Top for the Influential Artist". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.
^DeKnock, Jan (1989-12-22). "Last '80s Charts Good for the Old (Phil Collins) and the New (Milli Vanilli)". Chicago Tribune. Tribune Company. Retrieved 2009-04-24.