2018 Darwin Tennis International – Women's singles

Casey Dellacqua was the defending champion having won the previous edition in 2011, however she had retired from professional tennis in April 2018.

Kimberly Birrell won the title, defeating Ellen Perez in an all-Australian final, 6–3, 6–3.

Seeds
• # 🇦🇺 Olivia Rogowska (quarterfinals)

• # 🇦🇺 Arina Rodionova (first round)

• # 🇦🇺 Priscilla Hon (withdrew)

• # 🇦🇺 Jaimee Fourlis (first round)

• # 🇰🇷 Jang Su-jeong (first round)

• # 🇬🇧 Katy Dunne (first round)

• # 🇯🇵 Eri Hozumi (first round)

• # 🇦🇺 Destanee Aiava (second round)