| Honorific-Prefix: | GBS, JP |
| Alan Lai Nin | |
| Native Name Lang: | zh-hk |
| Birth Date: | 3 June 1951 |
| Office: | Commissioner of the Independent Commission Against Corruption |
| Term Start: | 15 July 1999 |
| Term End: | 30 June 2002 |
| Predecessor: | Lily Yam |
| Successor: | Ambrose Lee |
| Office2: | The Ombudsman of Hong Kong |
| Term Start2: | 1 April 2009 |
| Term End2: | 31 March 2014 |
| Successor2: | Connie Lau |
| Alma Mater: | University of Hong Kong |
Alan Lai Nin GBS,[1] JP (born 3 June 1951) is a Hong Kong politician and civil servant who served as the Director-General of the Trade and Industry Department from 1996 to 1999,[2] Commissioner of the Independent Commission Against Corruption from 1999 to 2002 and the Ombudsman of the Office of the Ombudsman from 2009 until his retirement in 2014. He is now a consultant with the Independent Police Complaints Council.[3]
In 2015, Lai was appointed as Commissioner of the Inquiry into the incidents of excess lead found in drinking water.[4]