The 2018 St. Petersburg Ladies' Trophy was a professional tennis tournament played on indoor hard courts. It was the 9th edition of the tournament and third time as a WTA Premier tournament. It was part of the 2018 WTA Tour and was held between 29 January and 4 February 2018.
<sub><sup>1</sup>Qualifiers prize money is also the Round of 32 prize money.</sub><br> <sub>*per team</sub>
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
The following pair received a wildcard into the doubles main draw: