| William Ian Rees Davies | |
| Honorific Prefix: | Professor |
| Honorific Suffix: | SBS |
| Office: | Vice-Chancellor of the University of Hong Kong |
| Term Start: | 2000 |
| Term End: | 2002 |
| Predecessor: | Patrick Yiu-Chung Cheng |
| Successor: | Tsui Lap-chee |
| Birth Date: | 1942 5, df=y |
| Death Place: | London, England |
William Ian Rees Davies (Chinese: 戴義安, 24 May 1942 – 24 July 2014) was the Vice-Chancellor of the University of Hong Kong in 2000–2002.[1] He died of kidney failure in 2014.[2]