Biker or bikie may refer to:
- A cyclist, a bicycle rider or participant in cycling sports
- A motorcyclist, any motorcycle rider or passenger, or participant in motorcycle sports
- A motorcycle club member, defined more narrowly than all motorcyclists
- An outlaw motorcycle club member, more narrowly than all motorcycle club members
See also
- Biker subculture (disambiguation)
- Byker, a district of Newcastle, England