Crumlin may refer to
- Crumlin, Belfast, a ward of North Belfast
- Crumlin, Caerphilly, a town in Caerphilly County Borough, Wales, United Kingdom
- Crumlin, County Antrim, a village in County Antrim, Northern Ireland, United Kingdom
- Crumlin railway station, Northern Ireland, County Antrim
- Crumlin, Dublin, a suburb of Dublin, Republic of Ireland
- the Crumlin meteorite of 1902, which fell in Northern Ireland, United Kingdom
- Crumlin GAA, a Gaelic Athletic Association in Dublin, Republic of Ireland
- Crumlin United F.C., a Northern Irish football club