Milmarcos is a municipality located in the province of Guadalajara, Castile-La Mancha, Spain. Situated in the northeast of the province, it lies within the comarca (district) of Señorío de Molina-Alto Tajo.
The municipality's history can be traced back to the Middle Ages. Its economy is primarily based on agriculture and livestock farming. The population, like many rural Spanish municipalities, has experienced a decline in recent decades.
Milmarcos is known for its rural setting and proximity to the Alto Tajo Natural Park, offering opportunities for outdoor activities such as hiking and nature observation. The local architecture reflects the traditional style of the region.