Dato Simon Peter Poh Hoon Seng (born 15 April 1963) is a Malaysian prelate of the Roman Catholic Church who has been serving as archbishop of the Archdiocese of Kuching since 2017.

After becoming a Catholic, Poh joined the school's club, Young Christian Students, the Legion of Mary, and St. Joseph's Cathedral's altar servers.

At the age of 25, Poh was ordained to the priesthood by Archbishop Peter Chung Hoan Ting on 31 July 1988.

He returned back to Kuching and served as parish rector for four years at St. Ann's Church, Kota Padawan.

Besides serving as assistant parish rector of St. Joseph's Cathedral, Kuching, he also coordinated the archdiocesan commission on mission and evangelisation.