2018 Oracle Challenger Series – Houston – Women's singles

This was the first edition of the tournament.

Peng Shuai won the title, defeating Lauren Davis in the final 1–6, 7–5, 6–4.

Seeds
• # Belinda Bencic (second round)

• # 🇷🇴 Monica Niculescu (withdrew)

• # 🇬🇧 Heather Watson (quarterfinals)

• # 🇺🇸 Jessica Pegula (semifinals)

• # 🇭🇺 Fanny Stollár (quarterfinals)

• # 🇺🇸 Varvara Lepchenko (second round)

• # 🇷🇺 Sofya Zhuk (semifinals)

• # 🇨🇿 Marie Bouzková (first round)

• # 🇺🇸 Nicole Gibbs (second round)

Seeds
• # 🇨🇦 Katherine Sebov (qualifying competition, lucky loser)

• # 🇺🇸 Whitney Osuigwe (qualified)

• # 🇺🇸 Lauren Davis (qualified)

• # 🇺🇸 Grace Min (moved into main draw)

• # 🇸🇰 Kristína Kučová (qualified)

• # 🇳🇴 Ulrikke Eikeri (first round)

• # 🇭🇺 Dalma Gálfi (qualified)

• # 🇺🇸 Maria Mateas (first round)

• # 🇺🇸 Ann Li (qualified)

• # 🇭🇺 Réka Luca Jani (qualifying competition, lucky loser)

• # 🇺🇸 Elizabeth Halbauer (qualified)

• # 🇺🇸 Maria Sanchez (withdrew, still competing in Las Vegas)

Qualifiers
• # 🇭🇺 Dalma Gálfi

• # 🇺🇸 Whitney Osuigwe

• # 🇺🇸 Lauren Davis

• # 🇺🇸 Elizabeth Halbauer

• # 🇸🇰 Kristína Kučová

• # 🇺🇸 Ann Li

Lucky losers
• # 🇺🇸 Jacqueline Cako

• # 🇨🇦 Katherine Sebov

• # 🇭🇺 Réka Luca Jani

• # 🇺🇸 Louisa Chirico