Slovak pair Jana Čepelová and Chantal Škamlová were the defending champions. They defeated Tímea Babos and Gabriela Dabrowski in the 2010 final, but chose to not start this year.
An-Sophie Mestach and Demi Schuurs were the defending champions but neither of them were eligible to participate in 2012.
Casey Dellacqua was the defending champion, having won the event in 2012, but decided not to defend her title the year after.
Zheng Saisai was the defending champion, but she lost to An-Sophie Mestach in the quarterfinals.
Nadia Petrova was the defending champion, but she chose to compete in Eastbourne instead.
Simona Halep won the title beating in the final Kirsten Flipkens, 6–4, 6–2.
Garbiñe Muguruza was the defending champion heading into the tournament but chose to compete at the Sydney tennis event instead of Hobart. In the final, it was unseeded Brit Heather Watson who defeated the American qualifier in Madison Brengle, 6–3, 6–4 to record her second WTA title.
This was the first edition of the tournament since 2008, when Cara Black and Liezel Huber won the title. Black and Huber chose not to participate this year.
Jarmila Gajdošová and Arina Rodionova were the defending champions, but chose not to participate.
This was a new event in the ITF Women's Circuit in 2015.
Svetlana Kuznetsova was the defending champion, but withdrew from her second round match due to a lower left leg injury.
Ashley Weinhold and Caitlin Whoriskey were the defending champions and successfully defended their title, defeating Jamie Loeb and Chanel Simmonds in the final, 6–4, 6–4.
Nao Hibino was the defending champion, but chose to participate in Montreal instead.
Jessica Moore and Storm Sanders were the defending champions, but decided not to participate this year.
Jelena Janković was the defending champion, but lost in the final to Lesia Tsurenko 4–6, 6–3, 4–6.
Shuko Aoyama and Makoto Ninomiya were the defending champions, but lost in the first round.
Elise Mertens and An-Sophie Mestach were the defending champions, but Mestach chose not to participate this year and Mertens chose to compete in Brisbane instead.
Julia Glushko and Alexandra Panova were the defending champions, but both players chose not to participate.
Kristýna Plíšková and Alison Van Uytvanck were the defending champions, but both players chose not to participate.
Cristiana Ferrando was the defending champion, but lost in the first round to Maria Sanchez.
An-Sophie Mestach and Laura Robson were the defending champions, but both players chose not to participate.
Ellen Perez 
Carol Zhao 
Alexa Guarachi 
