Peter Ross Prenzler (born 3 April 1952) is a former Australian politician.
Born in Boonah, he served in the Royal Australian Artillery and the Citizens Military Force 1969–1971.
In 1998, he was elected to the Legislative Assembly of Queensland as a member of Pauline Hanson's One Nation, representing the seat of Lockyer.
In addition to the deputy leadership, he held the position of spokesperson for Health, Primary Industries, Aboriginal and Torres Strait Islander Policy, Natural Resources, Environment and Heritage, Fair Trading and Women's Policy.
He contested the 2001 state election but was defeated by One Nation candidate Bill Flynn.