Alcaidesa is a beach side Development on the western end of the Costa del Sol, within the municipalities of San Roque and La Línea, Andalucía, Spain. It is situated between San Roque and Sotogrande at kilometer 124 of the N-340 motorway, with access by a service road from Junction 124.

Alcaidesa combines a mix of full time residents and residential tourism.

The area known as Alcaidesa Beach comprises approximately four square kilometres that stretch from the motorway two kilometer down to the beach front. The area has excellent potential for the development of housing, given the views from the gently sloping terrain down towards the Mediterranean Sea.