Average age in Ireland 2026 — 38.8 yrs by county

Ireland is 6 years younger than the EU average — but that headline figure hides a 30-year local span. University EDs record a median age of 22; some rural western electoral divisions exceed 55. The data is below.

Ireland average age — Census 2022 overview

Areas with the oldest populations in Ireland

These electoral divisions recorded the highest average ages in Census 2022. Older-median EDs cluster in rural areas losing population — the rural west, midlands, and border regions where younger people have emigrated or moved to cities. Counties Leitrim, Roscommon, and Mayo consistently appear in the oldest-area rankings.

Areas with the youngest populations in Ireland

These electoral divisions had the lowest average ages in Census 2022. Young-median EDs cluster around university campuses, large new housing estates built in the 2000s and 2010s, and fast-growing commuter towns. Kildare, Meath, and Wicklow dominate the youngest county rankings.

Average age in Ireland by county — Census 2022

County-level average ages range from the mid-30s in fast-growing urban and commuter counties to the mid-40s in the rural west. Decades of selective outmigration drive this spread — younger people leave for Dublin and abroad while older cohorts stay.

Why median age matters for area selection

Median age is a proxy for several factors that affect quality of life and service availability:

• School catchments and family areas: younger-median EDs tend to have more primary school places, family services, and new housing stock. Census 2022 shows a direct link between median age below 35 and more households with children.
• Service demand and local economy: older-median EDs in rural areas often see declining services — fewer shops, GPs, and schools as younger cohorts leave.
• Housing demand patterns: EDs with median age below 30 — often near universities or large new estates — face the highest rental pressure and lowest owner-occupancy rates.
• Population trajectory: An ED with a median age above 50 today will likely shrink over the next decade as that cohort ages, unless new migration or housing development arrives.

How Ireland's average age is changing

Ireland's median age rose from 36.1 at Census 2011 to 37.4 at Census 2016, and to 38.8 at Census 2022. Despite this steady rise, Ireland remains one of the youngest countries in the EU. The EU27 average age is about 44.5 — six years above Ireland's national figure.

The ageing trend is uneven. Fast-growing counties — Kildare, Meath, Wicklow — have seen their average age fall or hold steady as new family housing draws in younger residents. Rural western counties keep ageing as younger cohorts leave and inward migration stays low.

The urban-rural age divide

Dublin's average age of about 36 contrasts sharply with rural western counties where individual EDs exceed 55. This is not simply a rural-urban split — it reflects decades of outward migration from specific areas. The IrelandInsights map shows age at electoral division level, revealing within-county variation that county averages hide.

University towns — Galway, Limerick, Cork, Maynooth, and parts of Dublin — hold some of Ireland's youngest EDs. A university campus area in Galway might record an average age of 22. A rural ED in Mayo ten kilometres from the nearest town might record 54.

The 30-year local spread — from student EDs at 22 to western rural EDs above 55 — maps where Ireland's demographic momentum sits and where it is absent. Kildare and Meath are growing younger; Mayo and Leitrim are not. The map makes the trajectory visible.

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