| Details | |
|---|---|
| Duration | January 21, 2018 – November 18, 2018 |
| Edition | 7th |
| Tournaments | 10 |
| Achievements (singles) | |
| Most tournament titles |  Luksika Kumkhum (2) |
| Most tournament finals |  Irina Khromacheva Luksika Kumkhum  Zheng Saisai (2) |
← 2017 2019 → | |
The WTA 125K series is the secondary professional tennis circuit organised by the Women's Tennis Association. The 2018 WTA 125K series calendar consisted of ten tournaments, each with a total prize fund of $125,000 each except the Oracle Challenger Series that offer $150,000 in prize money.[1] After 2017, Dalian Women's Tennis Open and Hawaii Tennis Open were scrapped while Hua Hin Championships was replaced by Thailand Open, an international WTA event to take place at the same venue, beginning February 2019. 5 new tournaments were introduced in Newport Beach, Indian Wells, Chicago, Houston and Anning which was earlier an ITF event.
- ^ "WTA 125K Series". WTA Tour. Retrieved 7 February 2017.