Crumlin may refer to:
Northern Ireland
- Crumlin, Belfast, a ward of North Belfast
- Crumlin, County Antrim, a town in County Antrim
- Crumlin railway station, Northern Ireland, County Antrim
- Crumlin Viaduct (Northern Ireland), County Antrim
- Crumlin United F.C. (Northern Ireland), a Northern Irish club
- Crumlin Road, Belfast
- Crumlin Road Gaol, a former prison
- Crumlin Road Courthouse
Republic of Ireland
- Crumlin, County Westmeath, a townland in the civil parish of Rathaspick
- Crumlin, Dublin, a suburb of Dublin
- Crumlin GAA, a Gaelic Athletic Association in Dublin
- Crumlin United F.C.
Wales, UK
- Crumlin, Caerphilly, a town in Caerphilly County Borough