Espinosa de los Monteros is a municipality located in the province of Burgos, Castile and León, Spain, with a population of c. 2,100 inhabitants.

First settlements in the area date from the Bronze and Iron Age, but its modern settling and location officially started with the town charter given by Alfonso VI of León to repopulate it after its war destruction during the early 11th century.

It is home to the ancient Royal Guard of the "Gentlemen of the Chamber" since its founding in 1008 by Sancho García of Castile of the early local counts dynasty.

The main activities and industries have been related to military career services, stockbreeding mostly of cattle and as a regional hub of transportation due its geography, currently are intensified around dairy products and as modern commercial and services local center of its area and smaller neighbor communities of the wider valley.

In winter, due to its heavy snowfalls, it runs a modest ski resort mostly catering to the neighbor coastal major cities day and weekend tourism.