Chad David Alcock (born 9 January 1973) is a South African former professional rugby union player.
Alcock is one of twins and was born in Port Elizabeth. He attended Alexander Road High School and was a South African under-18 representative player. Outside of rugby, Alcock made custom fishing rods for the family business.
A diminutive scrum-half, Alcock was known for his try-scoring abilities and skills in wet conditions. He competed for Eastern Province for nine seasons and in 1998 toured with the Springboks, featuring in four mid-week fixtures. At Super 12 level, Alcock had stints with the Sharks and Cats. He played in New Zealand for North Harbour in 2003.