- Alastair (disambiguation)
- Alastair Cording
- Alastair Cumming
- Alastair Fergus
- Alastair Greener
- Alastair King
- Alastair King (in-universe)
- Alastair Lethbridge-Stewart
- Alastair Mackay
- Alastair Mackenzie
- Alastair Mitchell
- Alastair Montague
- Alastair Parker
- Alastair Reynolds
- Alastair Ross
- Alastair Sanderson
- Alastair Sill