| Bill Birtwistle | |
| Birth Name: | William Murray Birtwistle |
| Birth Date: | 4 July 1939 |
| Birth Place: | Auckland, New Zealand |
| Ru Position: | Wing |
| Height: | 1.80 m |
| Weight: | 73 kg |
| Repyears1: | 1965–1967 |
| Repcaps1: | 7 |
| Reppoints1: | 12 |
| Provinceyears1: | 1961 |
| Provinceyears2: | 1962–1966 |
| Provinceyears3: | 1967–1970 |
| Provinceapps1: | 2 |
| Provinceapps3: | 29 |
| Relatives: | Mark Birtwistle (nephew) |
| School: | Mount Roskill Grammar School |
William Murray Birtwistle (born 4 July 1939) is a former New Zealand rugby union player. A wing three-quarter, Birtwistle represented, and at a provincial level, and was a member of the New Zealand national side, the All Blacks, from 1965 to 1967. He played 12 matches for the All Blacks including seven internationals.[1]