- byNear or next to.
- byeThe position of a person or team in a tournament or competition who draws no opponent in a particular round so advances to the next round unopposed, or is awarded points for a win in a league table; also the phantom opponent of such a person or team.
- ByfieldA village and civil parish in West Northamptonshire district, Northamptonshire, England, previously in Daventry district (OS grid ref SP5153).
- BygraveA village and civil parish of North Hertfordshire district, Hertfordshire, England (OS grid ref TL258873).
- BeefordA village and civil parish in the East Riding of Yorkshire, England.
- BysouthA surname from Old English.