Daniel Gooi Zi Sen (Chinese: 魏子森; Jyutping: Ngai6 Zi2 Sam1; Pe̍h-ōe-jī: Gūi Chú-sim; born on 11 June 1987) is a Malaysian politician who has served as Member of the Penang State Executive Council (EXCO) in the Pakatan Harapan (PH) state administration under Chief Minister Chow Kon Yeow and Member of the Penang State Legislative Assembly (MLA) for Padang Lalang since August 2023.

His uncle, Gooi Seong Kin, currently special coordinator for the Chief Minister of Penang,[3] represented DAP to contest in the 1995 Malaysian general election for the Berapit state seat.

[1] After he graduated from Universiti Malaysia Sabah in 2009, he joined DAP in 2010 and served as by-then Penang State Executive Councilor for Tourism, Law Heng Kiang's office.

After the 2013 Malaysian general election, he was the special officer for the Penang State Executive Councilor for Housing, Jagdeep Singh Deo.

He successfully defeated the other candidates and became the Member of Penang State Legislative Assembly for Pengkalan Kota.