| Doubles | |
|---|---|
| 2015 Stockton Challenger | |
| Champions |  Jamie Loeb Sanaz Marand |
| Runners-up | Kaitlyn Christian Danielle Lao |
| Score | 6–3, 6–4 |
This was a new event in the ITF Women's Circuit in 2015.
Jamie Loeb and Sanaz Marand won the title, defeating Kaitlyn Christian and Danielle Lao in an all-American final, 6–3, 6–4.
Eri Hozumi / 
An-Sophie Mestach (quarterfinals)
Naomi Broady / 
Amandine Hesse (semifinals) Jan Abaza / Melanie Oudin (quarterfinals) Jamie Loeb / Sanaz Marand (champions)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | E Hozumi A-S Mestach | 6 | 4 | [11] | |||||||||||||||||||||||
J Cako  J Jakšić | 3 | 6 | [9] | 1 | E Hozumi A-S Mestach | 5 | 2 | ||||||||||||||||||||
| N Hibino E Webley-Smith | 6 | 6 | N Hibino E Webley-Smith | 7 | 6 | ||||||||||||||||||||||
| WC | J Elie R Valdes | 1 | 4 | N Hibino E Webley-Smith | 3 | 6 | [8] | ||||||||||||||||||||
| 4 | J Loeb S Marand | 6 | 2 | [10] | 4 | J Loeb S Marand | 6 | 4 | [10] | ||||||||||||||||||
| J Pegula M Sanchez | 3 | 6 | [3] | 4 | J Loeb S Marand | 64 | 7 | [10] | |||||||||||||||||||
 A Kalinina  J Moore | 3 | 0 | S Sanders  C Simmonds | 77 | 5 | [8] | |||||||||||||||||||||
| S Sanders C Simmonds | 6 | 6 | 4 | J Loeb S Marand | 6 | 6 | |||||||||||||||||||||
| WC | S Chang J Elbaba | 4 | 1 | K Christian D Lao | 3 | 4 | |||||||||||||||||||||
| K Christian D Lao | 6 | 6 | K Christian D Lao | 6 | 7 | ||||||||||||||||||||||
| A Weinhold C Whoriskey | 3 | 4 | 3 | J Abaza M Oudin | 3 | 5 | |||||||||||||||||||||
| 3 | J Abaza M Oudin | 6 | 6 | K Christian D Lao | 6 | 6 | |||||||||||||||||||||
M Arcangioli  R Zarazúa | 77 | 66 | [10] | 2 | N Broady A Hesse | 1 | 3 | ||||||||||||||||||||
| WC | J Kuhlman M Manasse | 63 | 78 | [7] | M Arcangioli R Zarazúa | 6 | 4 | [4] | |||||||||||||||||||
| J Boserup S Crawford | 3 | 3 | 2 | N Broady A Hesse | 2 | 6 | [10] | ||||||||||||||||||||
| 2 | N Broady A Hesse | 6 | 6 | ||||||||||||||||||||||||
Alexandra Mueller and Asia Muhammad were the defending champions, having won the previous edition in 2011, but Mueller chose not to participate. Muhammad teamed up with Sanaz Marand as the second seeds, but they lost in the first round.
Sanaz Marand and Florencia Molinero were the defending champions, but both players chose not to participate.
Daria Gavrilova and Storm Sanders were the defending champions, but Gavrilova chose to participate at İstanbul and Sanders chose to participate at Granby instead.
Svetlana Kuznetsova was the defending champion, but withdrew from her second round match due to a lower left leg injury.
Jan Abaza and Melanie Oudin were the defending champions, but Oudin chose not to compete. Abaza partnered Amra Sadiković, but they lost in the first round to Tamira Paszek and Anna Tatishvili.
This was a new event in the ITF Women's Circuit.
This is the first edition of the tournament as part of the WTA 125K Series.
Gabriela Cé and Verónica Cepede Royg won the title, defeating Oksana Kalashnikova and Tatjana Maria in the final 1–6, 6–4, [10–8].
Ysaline Bonaventure and Rebecca Peterson were the defending champions, but Bonaventure chose not to participate this year. Peterson played alongside Julia Glushko but lost in the first round to Paula Cristina Gonçalves and Sanaz Marand.
Verónica Cepede Royg and María Irigoyen won the title, defeating Tara Moore and Conny Perrin in the final, 6–1, 7–6(7–5).
Anhelina Kalinina and Oleksandra Korashvili were the defending champions, but both players chose not to participate.
Paula Cristina Gonçalves and Beatriz Haddad Maia were the defending champions, but Haddad Maia chose not to participate this year. Gonçalves played alongside Sanaz Marand, but lost in the first round to Sílvia Soler Espinosa and Anna Tatishvili.
Lara Arruabarrena and Tatjana Maria won the title, defeating Gabriela Cé and Andrea Gámiz in the final, 6–2, 4–6, [10–8].
Lyudmyla Kichenok and Xenia Knoll were the defending champions, but chose not to participate.
Jamie Loeb and Sanaz Marand were the defending champions, but both players chose to compete with different partners. Loeb partnered Catherine Bellis, but lost in the first round. Marand partnered Melanie Oudin, but lost in the quarterfinals.
Jan Abaza and Viktorija Golubic were the defending champions, but Golubic chose not to participate. Abaza partnered Alyona Sotnikova, but they lost in the quarterfinals.
Julia Glushko and Rebecca Peterson were the defending champions, but Glushko chose not to participate. Peterson partnered Sanaz Marand, but they lost in the first round.
Julia Glushko and Alexandra Panova were the defending champions, but both players chose not to participate.
Sanaz Marand and Melanie Oudin were the defending champions, but both players chose not to participate.
Natela Dzalamidze and Valeriya Strakhova were the defending champions, but both players chose not to participate.
Emina Bektas and Sanaz Marand were the defending champions, but both players chose not to participate.
Priscilla Hon and Vera Lapko were the defending champions, but both players chose not to participate.
The 2018 Stockton Challenger was a professional tennis tournament played on outdoor hard courts. It was the third and fourth editions of the tournament and was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Stockton, United States, on 1–7 October 2018.