Each edition grades its towns against each other only.
Some 6,355 people live in this neighbourhood, in Dublin. It grew by 19% between the 2016 and 2022 censuses.
Castleknock’s strongest subject is health — 45 residents in bad health and 73 with a disability for every 100 its ages predict. Jobs & income is a strength too (A): 77% of people aged 15 to 64 are in work, and unemployment is 6%. The trade-off is cost of living (D) — half the homes sold for more than €519,500, a price of 4.7 times what the median household earns. All told, that adds up to a B+ overall, better than 73% of Irish towns. That places it #30 of 116 in Co. Dublin. Elsewhere it is close to typical: C+ for safety and B− for hazard risk.
Figures: health and work, CSO Census 2022 · prices, Property Price Register, 2023 to 2025 · incomes, CSO · crime, CSO recorded crime, 2023 to 2025 · radon, EPA.
The 3 things Castleknock does most differently from other towns.
Each subject compares Castleknock with Irish towns of 2,500 or more, ordered by how far it is from the middle. Towns in other countries are graded separately.
How TownRatings grades Irish towns →
1 archaeological site are on the record here too.
1% of its homes were built before 1919, against 3% in the median of Irish towns.
Castles, abbeys, gardens, museums and days out in and near Castleknock. Best known first.
Big drawZooDublin Zoo2.4 km outside town, to the southeast · 1.3M visitors a year (2022)
Museum · Office of Public WorksKilmainham Gaol3.6 km outside town, to the southeast
Castle · Office of Public WorksPhoenix Park Visitor Centre - Ashtown Castle600 m outside town, to the southeast
MuseumIrish Museum of Modern Art3.8 km outside town, to the southeast
MuseumNational Museum of Ireland, Collins Barracks3.9 km outside town, to the southeast · 314K visitors a year
MuseumGuinness Storehouse4.5 km outside town, to the southeastPhotos: each place’s Wikidata image, from Wikimedia Commons under the licence below (our copy, resized).
Data highlights are ordered by what stands out in Castleknock.
93% of people in Castleknock rate their own health good or very good. Among the 40 Irish towns closest to its size, Castleknock ranks 1st on the Health Grade. At the census, 0.8% of people here described their health as bad or very bad.
| Census 2022 | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| With a disability | 16% | 22% | 22% |
| Bad or very bad health | 0.8% | 1.9% | 2% |
| Good or very good health | 93% | 89% | 88% |
| Unpaid carers | 5.5% | 5.3% | 5.4% |
CSO, Census 2022 general health, disability and carers · CSO life expectancy by region, 2016 · HSE medical cards, 2024 · TownRatings age-standardised ratios
Edmund Rice College is the nearest secondary school, 0.1 km away. 51% of the schools are in the DEIS scheme, above both Co. Dublin’s towns (40%) and Irish towns (35%). Families in Castleknock have 77 schools within 3 km to choose from: 50 primary schools, 20 secondary schools and 7 special schools.
| School | Level | Pupils | Ethos |
|---|---|---|---|
| St Patricks N.S.Largest primary schoolPrimary | Primary | 867 | Catholic |
| Castleknock Community CollegeLargest post-primary schoolPost-primary · ETB | Post-primary · ETB | 1,318 | Multi-denominational |
| Coláiste Mhuire GaelcholáisteTeaches through IrishPost-primary · Voluntary secondary | Post-primary · Voluntary secondary | 272 | Catholic |
| Phobailscoil Iosolde DEISIn the DEIS schemePost-primary · Community school | Post-primary · Community school | 764 | Inter-denominational |
| Schools within 3 km | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Single-sex secondaries | 25% | 40% | 39% |
| In the DEIS scheme | 51% | 40% | 35% |
| Teach through Irish | 4% | 7% | 8% |
| Pupils since 2019/20 | +2% | +4% | +4% |
Department of Education school lists, 2025/26 (preliminary) · no results are published by school · Without school-level results from Ireland, the cards show no letters.
25% of trips took under 15 minutes, above Co. Dublin’s towns (23%) but below Irish towns (31%). Working from home was the norm for 20% of workers at the census. The unemployment rate comes to 5.9%.
| Census 2022 | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Median household income | €109,590 | €72,400 | €57,760 |
| In work, 15 to 64 | 77% | 71% | 68% |
| Unemployment rate | 5.9% | 7.4% | 9.2% |
| Average trip | 30.7 min | 31.1 min | 27.6 min |
CSO, Census 2022 travel to work, work and education · CSO Geographical Profiles of Income 2022 · Live Register · Census day was 3 April 2022, with working from home still common; shares are of those who travelled.
72% of households own their home, above Co. Dublin’s towns (66%) and Irish towns (61%) alike. The social rented sector houses 3% of households. Prices in Castleknock have trailed Irish towns since 2010: the typical sale is up 70%, to €557K in 2025, against 77%.
| By type | Median | Sales |
|---|---|---|
| New homes | €506,100 | 123 |
| Second-hand homes | €525,000 | 781 |
| The last 12 months | €565,000 | 280 |
| Housing | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Households in social housing | 3% | 10% | 13% |
| Median sale price | €520K | €450K | €350K |
| Households owning their home | 72% | 66% | 61% |
| Rent on a new tenancy, a month | €2,169 | €2,063 | €1,606 |
Property Price Register · CSO residential prices by Eircode area · RTB rents · CSO, Census 2022 tenure
January nights in Castleknock drop to 2.6°C on average. Here July highs average 20.1°C, above both Co. Dublin’s towns (19.9°C) and Irish towns (19.9°C). Also worth knowing: this Co. Dublin town gets 798 mm of rain a year.
| Climate, 1991–2020 | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| July high | 20.1°C | 19.9°C | 19.9°C |
| January low | 2.6°C | 2.9°C | 2.9°C |
| Rain a year | 798 mm | 770 mm | 937 mm |
| Average temperature over the year | 10.2°C | 10.3°C | 10.3°C |
Met Éireann, 1991–2020 averages.
There are 117.7 ha of green space for every 1,000 people in Castleknock. Walkers have 6.2 km per km² of paths and tracks, above both Co. Dublin’s towns (5.4 km per km²) and Irish towns (2.1 km per km²). Its 4 parks give Castleknock 748 ha of green space between them.
| Outdoors | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Green space per 1,000 residents | 117.7 ha | 7.6 ha | 4.1 ha |
| Woodland within 1 km | 9.1% | 2.2% | 2.7% |
| Paths per km² of town | 6.2 km per km² | 5.4 km per km² | 2.1 km per km² |
| Near a park | 100% | 100% | 92% |
OpenStreetMap parks and paths, NPWS protected sites and the National Trails Register.
Over the coming week, Tuesday looks wettest, with about 7 mm of rain. A typical November day reaches 11°C and drops to 5°C at night: the forecast for Castleknock is set against that. Around 1 mm of rain is due today, on a breeze of up to 25 km/h, with a low of 9°C.
| Season | High | Low | Rain |
|---|---|---|---|
| Winter | 9°C | 3°C | 195 mm |
| Spring | 13°C | 5°C | 167 mm |
| Summer | 19°C | 11°C | 204 mm |
| Autumn | 14°C | 7°C | 232 mm |
Forecast: MET Norway (CC BY 4.0) · normals: Met Éireann, 1991–2020
People aged 15 to 24 make up 7.9% of the town. 18% of residents are 65 or over, higher than both Co. Dublin’s towns (14%) and Irish towns (14%). Under 15: 20% of residents.
50.2% of Castleknock’s residents are women
3,191 women and 3,164 men live here; across Ireland, women are 50.6%.
| Castleknock | Co. Dublin | Ireland | |
|---|---|---|---|
| Under 15 | 20% | 17% | 20% |
| 15–24 | 7.9% | 12% | 12% |
| 25–44 | 34% | 30% | 29% |
| 45–64 | 20% | 24% | 24% |
| 65+ | 18% | 14% | 14% |
| Primary or none | 3.1% | 8.5% | 9.7% |
| Lower secondary | 5.5% | 11% | 14% |
| Leaving Cert | 21% | 30% | 35% |
| Diploma or cert | 5.2% | 5.2% | 5.8% |
| Degree or higher | 65% | 44% | 36% |
CSO, Census 2022 · Co. Dublin and Ireland: the median of their towns of 2,500+
Independent lead Fingal County Council with 7 of 40 seats, but no party has a majority: 21 are needed. There is just one council for Castleknock, Fingal County Council: Ireland has only one tier of local government. Turnout at the last local elections was 42%, about level with Co. Dublin’s towns (42%) and below Irish towns (46%).
| Turnout | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Local elections, June 2024 | 42% | 42% | 46% |
| General election, November 2024 | 57% | 57% | 59% |
Department of Housing count sheets, 2024
1 archaeological sites are on the record, below both Co. Dublin’s towns (7) and Irish towns (11). Homes built before 1919 account for 0.9% of the housing. Castleknock’s built heritage counts 14 inventory entries, each of regional standing. One recorded monument or archaeological site lies here.
| Heritage | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Inventory buildings per 10,000 residents | 22 | 9 | 48 |
| Archaeological sites on the record | 1 | 7 | 11 |
| Homes built before 1919 | 0.9% | 1.2% | 3.4% |
NIAH, the National Inventory of Architectural Heritage · Sites and Monuments Record · CSO, Census 2022 homes by year built
More of the graded crimes in Castleknock were damage to property than anything else (2023–2025). Violence accounts for 4.7 recorded crimes per 1,000 residents a year. Each year, 6.9 burglaries and acts of damage are recorded per 1,000 residents.
Not in the gradeTheft, public order and offences found by Garda checks (drugs, road traffic, dangerous acts) are shown but left out of the Safety Grade, which counts violence, burglary and damage.
| Per 1,000 a year | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Violent crime | 4.7 | 5.3 | 5.7 |
| Burglary & damage | 6.9 | 7.5 | 6.4 |
CSO recorded crime by Garda station, 2023–2025, shared to towns by where residents live · Census 2022 populations
The nearest bathing water to Castleknock is Sandymount Strand, 11 km away, rated sufficient in 2025. Landslides: none of Castleknock lies in a high-susceptibility zone. Its homes mostly stand clear of low ground by water.
| Share of homes | Castleknock | Co. Dublin | Ireland |
|---|---|---|---|
| Low-lying near a river | 0% | 0% | 0.5% |
| In high-radon areas | 0% | 0% | 0% |
EPA radon map, GSI landslide susceptibility and our low-lying homes estimate from OPW LiDAR.
Castleknock’s built heritage counts 14 inventory entries, each of regional standing. One recorded monument or archaeological site lies here.
9 notable people were born in Castleknock.
Colin Farrell: Quejaytee, CC BY 4.0 · Liam Cosgrave: David Hume Kennerly, Public domain · John Wellington Gwynne: William James Topley, Public domain
The nearest places of 1,000 or more. Boundaries: Tailte Éireann, CSO Urban Areas 2022 and Electoral Divisions.
| Town | People | km | Overall | Cost | Safety | Health |
|---|---|---|---|---|---|---|
| Castleknock | 6,355 | — | B+ | D | C+ | A+ |
| Ashtown | 14,937 | 2.3 | A | C | C+ | A |
| Carpenterstown | 20,967 | 2.4 | A | B− | C+ | A+ |
| Blanchardstown | 24,613 | 2.6 | B | B− | C+ | B+ |
| Finglas South | 12,475 | 3 | C− | B | C− | D |
| Chapelizod | 4,862 | 3.3 | B− | B− | D | B− |
| Ballyfermot | 3,632 | 3.5 | C− | B | D | D− |
People: CSO, Census 2022. Distances: centre to centre.
Castleknock had 6,355 people at the 2022 census, up from 5,329 in 2016: 19.3% more, against 7.6% in the median of Irish towns.
The median age in Castleknock is 38.1, against 37.6 in the median of Irish towns.
Neighbourhood in Dublin
Castleknock has 6,355 people, in the area of Fingal County Council. TownRatings splits Dublin into neighbourhoods made from the CSO’s Electoral Divisions, named from Tailte Éireann’s gazetteer, so each has figures of its own.
Built from Tailte Éireann’s boundaries and the CSO’s Census 2022 (CC BY 4.0)
Sources: CSO, Census 2022 Small Area Population Statistics (CC BY 4.0) · Tailte Éireann, Urban Areas and Electoral Divisions 2022 (CC BY 4.0) · TownRatings grades, run #544 (Irish towns only). Under Creative Commons Attribution 4.0 (CC BY 4.0).
Contains Central Statistics Office (CSO) data, Census 2022, and Tailte Éireann boundaries (CSO Urban Areas, Small Areas, local electoral areas, constituencies), under Creative Commons Attribution 4.0 (CC BY 4.0).