Cities near Castlereagh
- Dundonald (~)
- The Spa (~5 km)
- Royal Hillsborough (~12 km)
- Castlewellan (~13 km)
- Lisburn (~16 km)
- Maghera (~16 km)
- Marshallstown (~19 km)
- Lenaderg (~21 km)
- Loughbrickland (~23 km)
- Comber (~24 km)
- Belfast (~24 km)
- Newry, Mourne and Down District Council (~25 km)
- Lurgan (~25 km)
- Portaferry (~27 km)
- Craigavon (~28 km)
- Newtownards (~30 km)