Ben Demery (born 19 September 1986) is an Australian Paralympic tandem cyclist with a vision impairment.
He comes from the New South Wales city of Newcastle.
His pilot throughout his career has been Shaun Hopkins.
He started competitive cycling in December 2005 and won a silver medal in the sprint and a bronze medal in the 1 km time trial at his first international competition, the 2006 IPC Cycling World Championships; that year he was named Lake Macquarie’s Sports Person of the Year.
In the next year's UCI Para-cycling Track World Championships, he won silver medals in both the sprint and the 1 km time trial.
At the 2008 Beijing Games, he won two silver medals in the Men's Sprint B VI 1–3 and Men's 1 km Time Trial B VI 1–3 events.