| 2005 WTA Tier I Series | |
| Duration: | January 31 – October 23 |
| Edition: | 16th |
| Tournaments: | 10 |
| Most Tournament Titles: | Kim Clijsters (3) |
| Most Tournament Finals: | Kim Clijsters Lindsay Davenport Justine Henin (3) |
| Previous: | 2004 |
| Next: | 2006 |
See main article: article and 2005 WTA Tour.
The WTA Tier I events are part of the elite tour for professional women's tennis organised by the WTA called the WTA Tour.[1]
| Tournament | Country | Location | Surface | Date | Prize money[2] | |
|---|---|---|---|---|---|---|
| Toray Pan Pacific Open | Japan | Tokyo | Carpet (i) | Jan 31 – Feb 6 | $1,300,000 | |
| Pacific Life Open | United States | Indian Wells | Hard | Mar 7 – 20 | $2,100,000 | |
| NASDAQ-100 Open | United States | Key Biscayne | Hard | Mar 21 – Apr 3 | $3,115,000 | |
| Family Circle Cup[3] | United States | Charleston | Clay (green) | Apr 11 – 17 | $1,300,000 | |
| Qatar Total German Open[4] | Germany | Berlin | Clay | May 2 – 8 | $1,300,000 | |
| Telecom Italia Masters Rome[5] | Italy | Rome | Clay | May 9 – 15 | $1,300,000 | |
| Acura Classic | United States | San Diego | Hard | Aug 1 – 7 | $1,300,000 | |
| Rogers Cup | Canada | Toronto | Hard | Aug 15 – 21 | $1,300,000 | |
| Kremlin Cup | Russia | Moscow | Carpet (i) | Oct 10 – 16 | $1,340,000 | |
| Zurich Open | Switzerland | Zürich | Hard (i) | Oct 17 – 23 | $1,340,000 |