| Alastair Lyon | |
| Fullname: | Alastair John Lyon |
| Birth Date: | 11 October 1979 |
| Birth Place: | Ficksburg, South Africa |
| Weight: | 1170NaN0 |
| School: | St. Andrew's School, Bloemfontein |
| University: | Free State Technikon |
| Position: | Prop |
| Currentclub: | Richmond |
| Youthyears1: | 1995–2001 |
| Youthyears2: | 2002 |
| Youthyears3: | 2003 |
| Years1: | 2004–2006 |
| Apps1: | 23 |
| Points1: | 5 |
| Years2: | 2006–2007 |
| Clubs2: | Chalon |
| Apps2: | 18 |
| Points2: | 0 |
| Years3: | 2007–2008 |
| Clubs3: | Bedford Blues |
| Apps3: | 11 |
| Points3: | 0 |
| Years4: | 2008–2009 |
| Clubs4: | Blackheath |
| Apps4: | 12 |
| Points4: | 0 |
| Years5: | 2009–present |
| Clubs5: | Richmond |
| Apps5: | 121 |
| Points5: | 5 |
| Clubupdate: | 16 August 2016 |
| Repupdate: | 16 August 2016 |
Alastair Lyon (born 11 October 1979) is a South African rugby union player. A prop forward, he has played at Newport Gwent Dragons, Border Bulldogs, Bedford Blues and currently plays semi-professionally for Richmond.[1]
He currently resides in the United Kingdom.