Clonsilla Electoral Division has an area of 14.7 km² / 3,627.1 acres / 5.7 square miles. There are 15 townlands in Clonsilla ED:
- Allenswood
- Astagob
- Barberstown
- Barnhill
- Blakestown
- Broomfield
- Castaheany
- Clonsilla
- Coolmine
- Hansfield
- Hartstown
- Kellystown
- Passifyoucan
- Sheepmoor
- Woodlands
Porterstown townland is is the Electoral Division of Castleknock, and has an area of: 0.9316 km² / 230 acres / 0.36 square miles
Picture from Home – Tailte Éireann, the new name for Ordinance Survey Ireland
