The 2016 Open Castilla y León was a professional tennis tournament played on outdoor hard courts. It was the 31st edition, for men, and 2nd edition, for women, of the tournament and part of the 2016 ATP Challenger Tour and the 2016 ITF Women's Circuit, offering totals of €64,000+H, for men, and $10,000, for women, in prize money. It took place in El Espinar, Segovia, Spain, on 25–31 July 2016.
Men's singles main draw entrants
Seeds
1 Rankings as of 18 July 2016.
Other entrants
The following player received a wildcard into the singles main draw: Nicolás Almagro Jorge Hernando Ruano Akira Santillan Ricardo Villacorta-Alonso
The following players received entry into the singles main draw with a protected ranking: Rémi Boutillier Albano Olivetti
The following players received entry from the qualifying draw: Daniel Cox Alex De Minaur Viktor Durasovic Jaume Pla Malfeito
Women's singles main draw entrants
Seeds
1 Rankings as of 18 July 2016.
Other entrants
The following player received a wildcard into the singles main draw: Arabela Fernández Rabener Michaela Hončová Claudia Hoste Ferrer Ana Román Domínguez
The following players received entry from the qualifying draw: Lucy Brown Alba Carrillo Marín Yésica de Lucas Jazzamay Drew Ángela Fita Boluda Lucía Marzal Martínez Yuriko Miyazaki Giorgia Pinto
The following player received entry by a lucky loser spot: Laura Sainsbury
Champions
Men's singles
Luca Vanni def. Illya Marchenko, 6–4, 3–6, 6–3.
Women's singles
Jessika Ponchet def. Rocío de la Torre Sánchez, 6–4, 6–2
Men's doubles
Purav Raja / Divij Sharan def. Quino Muñoz / Akira Santillan, 6–3, 4–6, [10–8]
Women's doubles
Charlotte Römer / Sarah-Rebecca Sekulic def. Jessika Ponchet / Ioana Loredana Roșca, 6–2, 7–6(7–4)