HSDC Alton, formerly known as Alton College, is located in Alton, Hampshire, England. In addition to offering A Levels, the College provides an adult education service to the local population. It was built in 1978 and was one of the first institutions in the UK to be a purpose-built sixth form college. On 1 March 2019 it merged with Havant and South Downs College, becoming the third campus of the college.

Notable alumni

Notable former students of HSDC Alton include:

• Russell Howard – comedian
• Alison Goldfrapp – musician
• Gwyneth Herbert – singer-songwriter
• Rebecca Harris – film producer
• Michael Auger – singer
• Ranil Jayawardena – Conservative Party MP for North East Hampshire
• Yvette Cooper – Labour Member of Parliament (MP) for Normanton, Pontefract and Castleford with the positions of Shadow Home Secretary and Shadow Minister for Women and Equalities
• Amber-Jade Sanderson – Australian politician
• Chris Wood – cricketer