If you live in Ballymun you're less likely to live as long as someone in Castleknock.
Those in Lucan, Blackrock and and Templeogue live longer than people in Kilmainham, Finglas and Crumlin.
A new study's been looking at life expectancy in Ireland, and it shows everyone's living longer thanks to advances in medicine.
But the death rates are falling faster for richer people - with the gap between the social groups widening.
Professor Richard Layte from Trinity and the ESRI says the results can be startling:
