San Esteban de Gormaz is a municipality in the province of Soria in the autonomous community of Castile-Leon, Spain.

This caused it to become a military objective for 200 years, from the beginning of the construction of its castle by the Arabs in the ninth century (at which time the population was called Castromoro) until it fell finally into the hands of the kingdom of Castile.

In 1187 the first Cortes of Castile were celebrated in the town and its importance continued growing until the end of the thirteenth century, when it reached its maximum splendor.

By this date it had 3000 inhabitants (120 knights), four parishes and two monasteries located outside the limits of the village.

However, recently it has carried out an industrialization project that helped elevate the population to the levels that it had known in better times.