The 2017 Open Castilla y León was a professional tennis tournament played on outdoor hard courts. It was the 32nd edition, for men, and 3rd edition, for women, of the tournament and part of the 2017 ATP Challenger Tour and the 2017 ITF Women's Circuit. It took place in El Espinar, Segovia, Spain, between 31 July – 6 August 2017.
Men's singles main draw entrants
Seeds
1 Rankings as of 24 July 2017.
Other entrants
The following players received wildcards into the singles main draw: Nicolás Álvarez Varona Gerard Granollers Carlos Taberner Bernabé Zapata Miralles
The following players received entry from the qualifying draw: Edoardo Eremin Hugo Grenier Mick Lescure David Vega Hernández
Women's singles main draw entrants
Seeds
1 Rankings as of 24 July 2017.
Other entrants
The following player received a wildcard into the singles main draw: Marina Bassols Ribera Ángela Díez Plágaro Claudia Hoste Ferrer Vera Zvonareva
The following players received entry from the qualifying draw: Ainhoa Atucha Gómez Alba Carrillo Marín Rocío de la Torre Sánchez Marta Huqing González Encinas María Gutiérrez Carrasco Nuria Párrizas Díaz Luisa Stefani Noelia Zeballos
Champions
Men's singles
Jaume Munar def. Alex De Minaur 6–3, 6–4.
Women's singles
Paula Badosa Gibert def. Ayla Aksu, 6–2, 6–4
Men's doubles
Adrián Menéndez-Maceiras / Sergiy Stakhovsky def. Roberto Ortega Olmedo / David Vega Hernández 4–6, 6–3, [10–7].