Peter G. Waieng (April 4, 1966 – August 22, 2013) was a Papua New Guinea politician. Waieng served as a member of the National Parliament of Papua New Guinea, representing the Kundiawa-Gembogl constituency, from 1997 to 2002. Waieng also served as the Minister of Defence within the Prime Minister's cabinet as a member of parliament.
Peter Waieng was born on April 4, 1966. He received a Bachelor of Arts in politics from the University of Papua New Guinea in 1989 and a master's degree in international relations from the University of Wollongong in 1995.
Waieng was elected to the National Parliament of Papua New Guinea in the 1997 general election. He was 31 years old at the time of the election. He was appointed as the country's Minister of Defence during his first term.
Waieng lost his bid for re-election in the 2002 general election.
Peter Waieng died on August 22, 2013, from injuries sustained in an attack at the age of 44.