Arnedillo is a village in the province and autonomous community of La Rioja, Spain. It is crossed by the Cidacos River. The municipality covers an area of 48.33 square kilometres (18.66 sq mi) and as of 2011 had a population of 477 people.

Arnedillo is famous for its hot springs, which emerge on the surface after being filtered at a temperature of about 50°C (125°F). There is a hot springs resort known as "Balneario de Arnedillo", which attracts many people to this small village.

Another tourist attraction are the footprints of dinosaurs that can be found near Arnedillo.

The origin of the village dates back to the Tenth Century.

In 1888, a bout of smallpox struck the village and the people of the village looked to a higher power for a solution. Locals decided to light one candle for each saint the village venerated, and Saint Andrew, the patron saint of health, was the last to burn out. The village organised burnings of rosemary on the streets, for its medicinal properties, and prayed to St. Andrew. After the smallpox bout subsided, every year a procession with smoke has been held in the village to celebrate the village's ancestors, and in 2013 the smoke festival was declared a Fiesta of National Tourist Interest.

• Castle Bridge.
• Castle.
• Saint Servando and Saint German Church.

• Hermitages: Saint Tirso, Peñalba, Virgin of the Tower, Saint Andrew, Saint Michael, Santiago, Saint Zoilo.

The municipality is well known for its thermal waters, which flow through several springs. Some of them are leveraged by the village's resort known as "Balneario de Arnedillo", and others are opened to everyone and they are known as "Pozas".

• Footprints of dinosaurs.
• Snowfield.
• The vulture's viewpoint.
• Wind farm.