Peter McDonald (born 22 September 1978) is an Australian former professional road cyclist. He won the Australian National Road Race Championships in 2009.

McDonald grew up in Armidale in country NSW. Both of his parents were school teachers. He worked as a school teacher in Darwin for a couple of years before returning to NSW where he began work as a bicycle courier in Sydney. A fellow courier introduced him to racing at Randwick Botany Cycling Club located at Heffron Park in Sydney's south east. Eventually he began to ride full-time for a number of smaller local teams. Coached by Adam Hogan of Cheeky Transport Bike shop he won Australia's Grafton-Inverell race, and won first National Road series win in Victoria at Bright. This led to riding for the Drapac Porsche team.