Benagil is a small Portuguese village on the Atlantic coast in the municipality of Lagoa, Algarve, in Portugal.

Up to the late 20th century, the village's economy was based on ocean fishing, but it developed into a tourist area with a widely used beach, Praia de Benagil. It has few inhabitants but in the summer many people come from abroad. The population is roughly 60. Benagil village and beach are located close to the internationally famous Marinha Beach.

The main tourist attraction in Benagil is Benagil Cave (Portuguese: Algar de Benagil). Out of all sea caves that dot the Algarve coastline between Lagos and Albufeira, the Benagil Cave is the only one that has been eroded both from the side and from the top. This unique natural process has resulted in an opening in the ceiling that allows the sunlight to brighten up the grotto and the beach that it hides. In 2023, after concerns of overtourism was raised, canoes, kayaks and surfboards are banned and there has been some proposals to setup limits and admission fee for tourists.