List of WTA number 1 ranked singles tennis players

The WTA rankings are the Women's Tennis Association's (WTA) merit-based system for determining the rankings in women's tennis. The top-ranked singles player is the player who, over the previous 52 weeks, has garnered the most ranking points on the WTA Tour. Points are awarded based on how far a player advances in tournaments and the category of those tournaments. The WTA has used a computerized system for determining the rankings since November 3, 1975. Since 1975, 29 women have been ranked No. 1 in singles by the WTA, of which 15 have been year-end No. 1.

Iga Świątek is the current singles world No. 1.

WTA No. 1 ranked singles players
The rankings are sourced by the WTA Media Guide and the WTA website (which usually revises its rankings every Sunday night or Monday morning, except when tournament finals are postponed).

{{Legend|#eaecf0|First-time No. 1 player.}} {{legend|#ffffcf|WTA rankings record.|text=‡}} {{legend|#ddfddd|Current World No. 1 (weeks are automatically updated).}}

Weeks at No. 1
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Consecutive
Weeks are updated automatically.
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The source for this through the week of January 2, 2012, is the 2012 WTA Tour Official Guide, page 177.

Weeks at No. 1 leaders timeline
Current record in bold.

Year-end No. 1 players
The source for this through to 2012 is the 2012 WTA Tour Official Guide, page 178. {|
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By year (continued)

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Time span between first and last dates No. 1 was held
{{Legend|#ddfddd|Current No. 1 player (date and age are updated automatically).}}
 * Active players and age records indicated in bold.

Weeks at No. 1 by decade

 * Current No. 1 player indicated in italic.

1970s*
* — Starting November 1975

2020s
WTA rankings were frozen from March 23, 2020 to August 9, 2020.


 * Stats are automatically updated on Mondays (UTC).

Weeks at No. 1 by country
Weeks are updated automatically.
 * Current No. 1 player indicated in bold.

* Monica Seles is included twice due to change of citizenship.