Chin was born in Kuching, Sarawak. He is married to Puan Sri Ruby Wee Hui Kiang, with whom he has two daughters and one son. He was educated as a barrister-at-law at Gray's Inn, London in 1971.
Chin returned to Sarawak and joined the law firm, M/s Wan Ullok, Jugah & Chin and started his law practice in Miri, Sarawak, in 1972. Tan Sri Peter Chin was the chairman for Miri Municipal Council in 1984. He retired as a partner of the law firm upon his appointment as the parliamentary secretary to the Federal Ministry of Welfare in 1986.
Political career
He has been the Member of Parliament of Miri in Malaysia since 1985 and he was the party organising secretary of the Sarawak United People's Party (SUPP).