Photo: David Hawgood · CC BY-SA 2.0Half of Castletroy is under 29, younger than 99% of Irish towns
The share of shared households of unrelated adults tops 97% of Irish towns: 27%. Compared with other places, one-person households are scarce here: 18%, fewer than in 76% of Irish towns. The 2022 Census put Castletroy’s population at 15,093, in 4,976 households. Locally, nearly two thirds of residents said they are Catholic.
What stands out about the people of Castletroy
A student neighbourhood
31% of residents aged 15 and over are students, more than in 99% of Irish towns; Ireland’s towns 10%. 26% of residents are 15 to 24. Social class & newcomers ↓
Younger than most towns
Half of Castletroy’s residents are under 29 and half over; the typical median across Irish towns is 37.6. 26% are 15 to 24 and 9.2% are 65 or over. Ages ↓
Growing faster than most
Castletroy went from about 12,390 people in 2016 to 15,093 in 2022, +22%: faster growth than in 92% of Irish towns. Population change ↓
A neighbourhood people move to
16% of residents lived somewhere else a year before the Census, 2.1 times the share across Ireland’s towns; 3.9% came from abroad. Social class & newcomers ↓
Written from the data on this page: CSO Census 2022.
Castletroy grew +22% from 2016 to 2022, faster than 92% of Irish towns
Residents at the 2016 and 2022 censuses, on 2022 boundaries, and the change beside the county’s towns and Ireland’s.
Change, 2016 to 2022
CSO publishes yearly population estimates for counties and regions, not towns, so the trend is two censuses rather than a line; 2016 ages aren’t on 2022 boundaries, so there is no change by age.
Medians for comparison: +8% across Ireland’s towns; +9% across Co. Limerick’s towns.
26% of residents are aged 15 to 24, a share 99% of Irish towns don’t reach
Share of residents in each five-year band; the tick is the typical town.
Residents aged 65 and over: 9.2%, below 83% of Irish towns. The usual figure: 12% of residents are aged 15 to 24 across Ireland’s towns.
Median age of Irish towns of 2,500+
■ Castletroy, 29. The typical town is 37.6.
Broad ages · share of residents
Women and men · all residents
50% women, 50% men
About an even split. Median share of women: Co. Limerick 51.2%, Ireland 51.2%.
A student neighbourhood: 31% of residents 15 and over are students
CSO’s social classes (everyone, by their own or their family’s occupation), the occupations of those at work, and where residents lived a year before the Census.
Residents by social class · all residents
Where residents lived a year earlier
Residents who lived somewhere else a year earlier. The bar runs to 25%.
Workers by occupation · residents at work
Among workers, professional occupations stand out: 37%, against a typical 21%. Residents who moved in within the year are more common here than in 93% of Irish towns. As a reference point, 10% of residents 15 and over are students across Ireland’s towns.
Households of parents with children make up 32% in Castletroy, less than in 83% of Irish towns
Private households by CSO’s family types, beside the county’s towns and Ireland’s.
Against Co. Limerick’s towns and Ireland’s towns
People per household
Ireland’s towns.
The typical household size is 2.9 people. Across Ireland’s towns, households of parents with children come to 43%.
Households without a car or van make up 10% in Castletroy, less than in 75% of Irish towns
Home types, cars and the internet, by household. Owning and renting are on Cost of living.
Type of home
Cars or vans · share of households
Internet at home · share of households
Nothing unusual on holiday homes: 0.1%, close to the figure across Ireland’s towns. Households without a car or van: 17% across Ireland’s towns, for comparison. For Castletroy, the census puts households in flats at 19%.
Household income, middle of the range: €74,760 a year
Household income in 2022 from CSO’s linked administrative data (GPIIA): the middle household’s income before and after tax.
€74,760 a year before tax puts the median household 24% above Ireland (€60,120). For Co. Limerick, the figure is €55,950.
19% of residents are citizens of another country, a share 71% of Irish towns don’t reach
Place of birth and citizenship as CSO asks them: born abroad includes Irish citizens born abroad.
Born abroad, by birthplace · share of all residents; the bar runs to 30%
Citizenship · share of all residents; the bar runs to 30%
Citizens of another country, by citizenship; CSO counts dual Irish citizens as Irish.
Other languages · share of all residents
CSO’s small-area tables don’t give the year people arrived.
A quarter of residents were born outside Ireland (Ireland’s towns: 22%). As a reference point, 15% of residents are citizens of another country across Ireland’s towns. Among residents born abroad, the largest groups were born outside the EU and UK (10%) and elsewhere in the EU (4.4%).
Of Castletroy’s residents, 51% can speak Irish
Residents aged 3 and over who can speak Irish, and how often they speak it outside education (CSO).
Irish speakers · residents aged 3 and over
Castletroy sits close to the norm on daily speakers of Irish outside education: 1.4%, about the same as across Ireland’s towns. The ability to speak Irish extends to 6,183 residents (51% of those aged 3 and over). The highest share in Co. Limerick belongs to Farranshone (1.9%).
More residents with no religion than 72% of Irish towns: 22%
Ethnic or cultural background and religion, in CSO’s categories, as people described themselves.
Ethnic groups other than White Irish · all residents
White Irish, not charted: 76% of Castletroy · Co. Limerick’s towns 82% · Ireland’s towns 78%.
Religion · all residents
The next-largest groups, after White Irish, are Other White (10%), Asian or Asian Irish (8%) and Other, including mixed (2.9%). For comparison, 17% of residents said they have no religion across Ireland’s towns. On residents who describe themselves as White Irish, Castletroy sits lower than 57% of Irish towns: 76%.
Married residents 15 and over make up 30% in Castletroy, less than in 81% of Irish towns
Marital status of residents 15 and over, and unpaid carers.
Partnership status · residents 15 and over
The small-area tables count carers, not their hours of care.
Across Ireland’s towns, the share of unpaid carers is 5.4%; Castletroy has 3.5%. To put it in context, 34% of residents 15 and over are married across Ireland’s towns.
Adults with a degree or higher make up 60% in Castletroy, more than in 92% of Irish towns
Highest level of education completed, residents 15 and over whose education has ended.
Highest qualification · residents 15+ whose education has ended
At the top, 26% of adults have a postgraduate qualification; at the other end, 3.8% finished at primary level or earlier, against 9.7% across Ireland’s towns. 50% of residents 15 and over are still in education. Measured more widely, 36% of adults whose education has ended hold a degree or higher across Ireland’s towns.
Of 41 towns its size (12,743 to 17,508 people), the 1st youngest
Median age of the Irish towns nearest in population; hover a dot.
Castletroy is the youngest (29); Ballinteer the oldest (44.1). Nearest to Castletroy in age: Clonskeagh (29.4) and Hollystown (30.9).
No nearby town is as young as Castletroy
The nearest places, coloured by median age; each is a census neighbourhood.
Health, work, housing and schools
What this data can and can’t tell you
- Against Co. Limerick’s towns and Ireland’s towns. Each comparison is its own median: over Co. Limerick’s towns of 2,500 or more and over the Irish towns of 2,500 or more (city totals left out). Percentiles are within Ireland only.
- The earlier population is an estimate. Towns had no official 2016 count on today’s boundaries, so the 2016 figure is CSO’s electoral-division count shared out by where people lived in 2022: read a small town in a large rural division loosely.
- What these tables don’t give. The small-area tables give no year of arrival and no hours of care, and a town’s electoral divisions run past its edge, so the page doesn’t split a town into named areas (a city lists its neighbourhoods).
- The census’s own words. Born abroad, citizenship, ethnic or cultural background and religion are CSO’s questions and categories; the page compares them with other towns and never labels a town by them.
- Neighbourhoods are sums of small areas. Neighbourhood figures are TownRatings sums of CSO Small Areas
Questions about Castletroy’s residents
What is the population of Castletroy?
Castletroy had 15,093 residents at the 2022 Census, counted within its neighbourhood, 22% more than 2016.
What is the average age in Castletroy?
The median age is 29, younger than 99% of Irish towns. 19% are under 18 and 9.2% 65 or older.
How many people speak Irish in Castletroy?
51% of residents aged 3 and over can speak Irish (6,183 people), and 1.4% speak it every day outside education, against a typical 1.1% across Ireland’s towns.
How diverse is Castletroy?
76% describe themselves as White Irish (Ireland’s towns: 78%); 25% were born abroad and 19% are citizens of another country.
What religion are people in Castletroy?
65% are Catholic, 22% have no religion and 13% another religion; 16% didn’t say.
Is Castletroy good for families?
32% of households are parents with children (Ireland’s towns 43%), and 19% of residents are under 18. Schools near Castletroy are on its Schools page.
What is the median income in Castletroy?
Median gross household income in Castletroy was €74,760 in 2022, against €55,950 across Co. Limerick and €60,120 for Ireland.
Sources: CSO, Census of Population 2022, Small Area Population Statistics · CSO PxStat FP009 (2016 by electoral division) · CSO GPIIA, household income 2022 · Neighbourhood figures are TownRatings sums of CSO Small Areas. 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).