| Honorific-Prefix: | Yang Berhormat Dato' Haji |
| Zaifulbahri Idris | |
| Honorific-Suffix: | DPNS DNS PJK MLA |
| Native Name: | سيف البحري إدريس |
| Birth Name: | Zaifulbahri bin Idris |
| Birth Place: | Negeri Sembilan, Malaysia |
| Office: | Member of the Negeri Sembilan State Executive Council |
| 1Blankname: | Menteri Besar |
| 1Namedata: | Mohamad Hasan |
| Term Start: | 22 May 2013 |
| Term End: | 12 May 2018 |
| Predecessor: | Abdul Samad Ibrahim |
| Successor: | Mohamad Taufek Abd. Ghani Mohamad Rafie Abdul Malek |
| Constituency: | Chembong |
| Constituency Am1: | Chembong |
| Assembly1: | Negeri Sembilan State Legislative |
| Majority1: | 4,023 (2008) 6,480 (2013) 4,427 (2018) 4,335 (2023) |
| Term Start1: | 8 March 2008 |
| Predecessor1: | Mohd Rais Zainuddin (BN–UMNO) |
| Citizenship: | Malaysian |
| Party: | United Malays National Organisation (UMNO) |
| Otherparty: | Barisan Nasional (BN) |
| Occupation: | Politician |
Zaifulbahri bin Idris is a Malaysian politician who has served as Member of the Negeri Sembilan State Legislative Assembly (MLA) for Chembong since March 2008. He served as Member of the Negeri Sembilan State Executive Council (EXCO) in the Barisan Nasional (BN) state administration under former Menteri Besar Mohamad Hasan from May 2013 to the collapse of the BN state administration in May 2018. He is a member of the United Malays National Organisation (UMNO), a component party of the BN coalition.
| Constituency | Candidate | Votes | Pct | Opponent(s) | Votes | Pct | Ballots cast | Majority | Turnout | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | N26 Chembong | (UMNO) | 7,017 | 70.25% | (PAS) | 2,994 | 29.75% | 10,155 | 4,023 | 78.13% | ||||
| 2013 | Zaifulbahri Idris (UMNO) | 10,153 | 73.43% | Zakaria Dahlan (PAS) | 3,673 | 26.57% | 14,062 | 6,480 | 86.70% | |||||
| 2018 | Zaifulbahri Idris (UMNO) | 9,079 | 60.45% | (BERSATU) | 4,652 | 30.97% | 15,330 | 4,427 | 84.60% | |||||
| Rosmin Adam (PAS) | 1,288 | 8.58% | ||||||||||||
| 2023 | Zaifulbahri Idris (UMNO) | 11,261 | 61.92% | bgcolor= | Bakly Baba (BERSATU) | 6,926 | 38.08% | 18,350 | 4,335 | 71.61% | ||||