2018 Koser Jewelers Tennis Challenge

The 2018 Koser Jewelers Tennis Challenge was a professional tennis tournament played on outdoor hard courts. It was the twelfth edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Landisville, United States, on 6–12 August 2018.

Seeds

 * 1 Rankings as of 30 July 2018.

Other entrants
The following players received a wildcard into the singles main draw:
 * 🇺🇸 Gail Brodsky
 * 🇺🇸 Sophie Chang
 * 🇺🇸 Lauren Davis
 * 🇺🇸 Joelle Kissell

The following player received entry using a protected ranking:
 * 🇧🇾 Olga Govortsova
 * 🇺🇸 Jessica Pegula

The following player received entry by a special exempt:
 * 🇺🇸 Ann Li

The following players received entry from the qualifying draw:
 * 🇦🇺 Kimberly Birrell
 * 🇺🇸 Hayley Carter
 * 🇯🇵 Risa Ozaki
 * 🇫🇷 Jessika Ponchet

The following players received entry as a lucky loser:
 * 🇯🇵 Eri Hozumi

Singles

 * 🇺🇸 Madison Brengle def. 🇺🇸 Kristie Ahn, 6–4, 1–0, ret.

Doubles

 * 🇦🇺 Ellen Perez / 🇦🇺 Arina Rodionova def. Chen Pei-hsuan /  Wu Fang-hsien, 6–0, 6–2