Town comparison · Castleknock vs Dun Laoghaire

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Castleknock or Dun Laoghaire?

Both towns measured at town level, not the wider Eircode area, on the same 52 figures: prices, schools, amenities, social life, commute, affluence and safety.

Castleknock, Co. Dublin City · D15 · 3,716 people | Dun Laoghaire, Co. Dublin City · A96 · 3,061 people

Castleknock is the stronger town on the data. It leads on 3 of the 7 dimensions to Dun Laoghaire’s 2, with 2 level.

Castleknock leads on
schools & amenitiespublic transportaffordability
Dun Laoghaire leads on
education levelssafety
121426

Castleknock aheadlevel or not comparableDun Laoghaire ahead

AffluenceEducationAmenitiesTransportSafetyAffordabilityCity access
CastleknockDun Laoghaire
iCastleknock sits in D15, Dun Laoghaire in A96. Each figure below is tagged with the geographic level it’s actually measured at. The town ahead on a row is the one in green. Scores and percentages are charted against a true 0 to 100 scale; every other row is charted against the larger of the two towns, so the bars compare but don’t imply a ceiling.
!Castleknock & Dun Laoghaire are city suburbs — its boundary follows the postal area (the Small Areas whose addresses carry the name), not an official settlement line, so it can run broader than the local core and the figures cover that wider postal patch.

Outlines are each town’s CSO Small Areas — the exact footprint every figure is measured over.

Castleknock
Dun Laoghaire

Size

TOWN · census

Resident population at the 2022 CSO census, summed over the Small Areas that make up each town. Not scored: a bigger town isn’t a better one, it just explains why the counts below differ.

3,716
Population
3,061

Prices & market

TOWN · exact
€540k
Median sale pricelower is better
€642k
Castleknock leads
€433k – €744k
Typical range (P25–P75)
€489k – €855k
631
Sales (24m)
496
+1.5%
Price momentum (YoY)
-10.8%
17.7%
New-build share
2.4%

Schools, health & amenities

TOWN · counts

Facilities in and around each town — each counted once, for the town it’s closest to. Bigger towns naturally score higher — read alongside population.

7 prim · 3 sec
Schools
3 prim · 1 sec
Castleknock leads
Castleknock · 10 schools (largest first)
Castleknock Community College Secondary
1,290 pupils · 75% to 3rd-level · MULTI DENOMINATIONAL
Luttrellstown Community College Secondary
998 pupils · 75% to 3rd-level · MULTI DENOMINATIONAL
Edmund Rice College Secondary
813 pupils · 75% to 3rd-level · CATHOLIC
St Patricks Ns Primary
891 pupils · Catholic
St Brigids Mxd N S Primary
878 pupils · Catholic
Scoil Thomais Primary
640 pupils · Catholic
Castleknock Educate Together Ns Primary
409 pupils · Multi Denominational
St Francis Xavier J N S Primary
388 pupils · Catholic
St Francis Xavier Senior N S Primary
376 pupils · Catholic
Scoil Naisunta Chnuacha Primary
199 pupils · Church Of Ireland
Dun Laoghaire · 4 schools (largest first)
Rathdown School Secondary
349 pupils · 85% to 3rd-level · CHURCH OF IRELANDFee-paying
Monkstown Eucate Together Ns Primary
427 pupils · Multi Denominational
St Josephs Primary
392 pupils · CatholicDEIS
Clochar San Dominic Primary
194 pupils · CatholicDEIS
20
Creches
13
Castleknock leads
3
GP practices
4
Dun Laoghaire leads
8
Pharmacies
8
0
Hospitals
2
Dun Laoghaire leads
42
Bus stops
36
Castleknock leads
1
Rail / Luas stops
1
5
Gyms & leisure
11
Dun Laoghaire leads
6
Parks & playgrounds
17
Dun Laoghaire leads
66
Sports pitches
22
Castleknock leads

Social life

TOWN · counts

Places to eat, drink and go out in and around each town — each counted once, for the town it’s closest to. The residents per venue row is the fairer read — raw counts just track town size, so a big town wins by being big.

8
Restaurants
18
Dun Laoghaire leads
5
Cafés
30
Dun Laoghaire leads
10
Pubs & bars
7
Castleknock leads
9
Takeaways
14
Dun Laoghaire leads
0
Nightclubs
0
0
Cinema & theatre
2
Dun Laoghaire leads
116
Residents per venuelower is better
43
Dun Laoghaire leads

Day-to-day

TOWN · counts

The errands you run without thinking about them. Same caveat — read the residents-per-service row alongside the counts.

4
Supermarkets
6
Dun Laoghaire leads
4
Convenience shops
12
Dun Laoghaire leads
1
Bakery, butcher & greengrocer
5
Dun Laoghaire leads
0
Banks
5
Dun Laoghaire leads
2
Post offices
3
Dun Laoghaire leads
3
Hairdressers
14
Dun Laoghaire leads
4
Dentists
5
Dun Laoghaire leads
1
Vets
2
Dun Laoghaire leads
1
Filling stations
2
Dun Laoghaire leads
5
EV charging
8
Dun Laoghaire leads
2
Library & community centre
7
Dun Laoghaire leads
138
Residents per shop or servicelower is better
44
Dun Laoghaire leads

Commute by car

TOWN · from centre

Drive time from the town centre to each city centre — typical off-peak, with an estimated weekday rush hour. OSRM road routing.

17m · ~35 rush
Dublinlower is better
21m · ~40 rush
Castleknock leads
118m · ~130 rush
Waterfordlower is better
125m · ~140 rush
Castleknock leads
139m · ~155 rush
Limericklower is better
147m · ~165 rush
Castleknock leads
144m · ~170 rush
Galwaylower is better
158m · ~180 rush
Castleknock leads
178m · ~200 rush
Corklower is better
186m · ~210 rush
Castleknock leads

Affluence & profile

ELECTORAL DIVISION
6.8
Affluence (Pobal HP)
7.3
Dun Laoghaire leads
Castleknock · 8 EDs, poorest → richest
-7Blanchardstown-coolmineBelow average
-6Blanchardstown-coolmineBelow average
0Blanchardstown-delwoodBelow average
+0Blanchardstown-delwoodAbove average
+8Castleknock-knockmaroonAffluent
+9Castleknock-knockmaroonAffluent
+9Castleknock-parkAffluent
+10Castleknock-parkAffluent
Dun Laoghaire · 15 EDs, poorest → richest
+3Cabinteely-granitefieldAbove average
+4Dun Laoghaire-west CentralAbove average
+4Dun Laoghaire-west CentralAffluent
+5Dun Laoghaire-glasthuleAffluent
+5Cabinteely-granitefieldAffluent
+5Dun Laoghaire-glasthuleAffluent
+7Dun Laoghaire-glenagearyAffluent
+7Dun Laoghaire-sallynoggin WestAffluent
+8Dun Laoghaire-east CentralAffluent
+9Blackrock-carysfortAffluent
+10Blackrock-carysfortAffluent
+10Dun Laoghaire-east CentralAffluent
+10Mansion House BAffluent
+13Dun Laoghaire-glenagearyVery affluent
+17Mansion House BVery affluent
60.1%
Third-level educated
65.3%
Dun Laoghaire leads
56.0%
Professional class
56.6%
Dun Laoghaire leads
7.1%
Unemployment
7.1%
71.7%
Owner-occupier
51.9%
Castleknock leads
24.4%
Private rental
37.0%
3.1%
Social housing (LA)
6.4%

Liveability & safety

AREA · D15 / A96

Wider-area figures, not the town. Quality of life & rank are for the whole Eircode area each town sits in (CastleknockD15, Dun LaoghaireA96); safety & crime are the DMR West Garda division.

66/100
Quality of Life
66/100

Quality of Life is the equal-weighted average of these seven 0–100 dimensions, scored for the whole Eircode routing area (D15 / A96) from official data — Garda crime, CSO income & census, OPW flood, EPA water, and transport/healthcare/broadband coverage. Refreshed quarterly. The dashed line is each town’s overall score (that average) — dimensions to its right beat the average, to its left fall short. Two towns can share a score with a very different mix.

CastleknockDun LaoghaireOverall (avg)
Safety66486671
Affordability6610
Infrastructure10088
Family6062
Education6378
Environment6980
Economic5373
020406080100020406080100
#35
National rank
#35
#10
County rank
#10
48/100
Safety
71/100
Dun Laoghaire leads
79.6
Crime / 1,000lower is better
41.6
Dun Laoghaire leads

Affluence range

Pobal HP deprivation index, published per Electoral Division, so the spread shows the town’s poorest to richest ED. A town that is a single ED shows one mark, no range.

Castleknock Affluent+6.8
← more deprivednational avg · 0more affluent →
Spread across the town: Blanchardstown-coolmine -7 (least affluent) → Castleknock-park +10 (most affluent). It straddles the national average.
Dun Laoghaire Affluent+7.3
← more deprivednational avg · 0more affluent →
Spread across the town: Cabinteely-granitefield +3 (least affluent) → Mansion House B +17 (most affluent). Even its least-affluent neighbourhood is above the national average.

How accurate is this, and at what level?

TOWN
Prices, amenities and commute are exact and town-specific.

Prices come from individual PPR sales inside the town’s Small-Area boundary; schools, GPs, transport, gyms and parks are counted the same way; commute is routed from the town centre.

ED
Affluence, profile and tenure are Electoral-Division level.

Published per Electoral Division and averaged across the town’s EDs, with a range where the town spans several.

AREA
Liveability and safety are wider-area, not the town.

Quality of life and rank are per Eircode routing key; safety and crime are the Garda division (DMR West), coarser than a town, so two towns in the same county read the same.

Population growth isn’t shown: the 2016 and 2022 censuses don’t use the same Small Areas, and the areas that were re-cut are the ones that grew, so a like-for-like comparison understates growth badly. Rent and yield are still too sparse to show per town. Built from 22 CSO Small Areas.

Homes for sale in Castleknock

The stronger town on the data.

Compare somewhere else

Put any two Irish towns head to head, or step up to the wider Eircode areas.