Tony Castro, Conde das Antas, Conde da Lousa, Visconde de Pernes, born 1952, is a British yacht designer, known for numerous winning designs. Born in Lisbon, Portugal, he has been designing sailing and motor yachts since about 1980, with more than 10,000 boats launched, ranging from custom boats and one-design production models to superyachts. His design firm is based in Hamble-le-Rice, England.