Ribamontán al Mar is a municipality located in the autonomous community of Cantabria, Spain. It is situated in the northern part of the Iberian Peninsula, bordering the Bay of Biscay to the north. The municipality is part of the comarca of Santander.

The town of Ribamontán al Mar is the capital of the municipality, which comprises several smaller villages and hamlets. The area is known for its natural beauty, with a coastline featuring beaches and cliffs, and an interior landscape of hills and valleys. The municipality has a total area of approximately 35.7 square kilometers.

Ribamontán al Mar has a rich cultural heritage, with historical landmarks such as the Church of Santa María de La Asunción and the Tower of El Corno. The area is also known for its gastronomy, which features local specialties such as seafood and meat dishes. The economy of the municipality is primarily based on tourism, agriculture, and small-scale industry.

The municipality has a population of around 3,000 inhabitants, with a mix of urban and rural communities. Ribamontán al Mar is connected to the rest of Cantabria and Spain through a network of roads and highways. The nearest major city is Santander, the capital of Cantabria, which is located approximately 30 kilometers to the east.