Suburb in Wollongong

Mount Saint Thomas, NSW

Mount Saint Thomas had a population of 1,541 at the 2021 Census (+5.0% since 2016). Median age 37.2. Median weekly household income $1,850. Source: ABS Census 2021, via Censible. Census 2026 data arrives June 2027.

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Mount Saint Thomas at a glance

What the 2021 Census says, compared with New South Wales.

In Illawarra

Between the 2016 and 2021 censuses, Mount Saint Thomas's population grew by 5.0% to 1,541, slower than New South Wales as a whole (+7.9%). With a median age of 37.2, it is younger than the NSW average (38.4). Children under 10 make up 12.5% of residents, and people aged 70 and over 9.9%.

26.9% of households rent, a smaller share than the NSW average of 33.1%. 29.4% own their home outright. Almost every home is a house; flats and apartments are 1.9% of homes. The 2021 Census counted 574 households.

The median household earns $1,850 a week, in line with the NSW average of $1,829. Renters pay a median $312 a week, and households with a mortgage repay $2,161 a month.

22.8% of residents were born overseas, fewer than the NSW average of 31.0%. 18.0% use a language other than English at home. 43.6% report no religion, higher than the NSW average (35.7%).

Key figures

2021 Census, Mount Saint Thomas beside NSW and Australia.

Mount Saint ThomasNSWAustralia
Population1,541*8,072,17125,422,828
Growth since 2016+5.0%+7.9%+8.6%
Median age37.2*38.438.2
Households574*2,900,4569,275,123
Flats and apartments1.9%*21.8%14.3%
Renting26.9%*33.1%31.1%
Owned outright29.4%*32.0%31.4%
Median household income a week$1,850*$1,829$1,747
Median rent a week$312*$423$376
Median mortgage repayment a month$2,161*$2,142$1,866
Born overseas22.8%*31.0%29.3%
Other language at home18.0%*28.2%23.6%
No religion43.6%*35.7%41.9%

Source: ABS Census 2021, via Censible. * estimated on 2026 boundaries. How the figures are built

Population and age

Each census since 2011, and the age profile in 2021.

Population

+5.0% since 2016.

Population · each census
  1. 1,4932011
  2. 1,4682016
  3. 1,5412021

Age

Median age 37.2, against 38.4 for New South Wales.

Mount Saint Thomas New South Wales
0–912.5%
10–1912.9%
20–2913.3%
30–3914.4%
40–4913.8%
50–5913.2%
60–699.5%
70–796.5%
80+3.4%

Source: ABS Census 2021, via Censible. How the figures are built

Cultural background

The largest groups in Mount Saint Thomas at the 2021 Census.

Ancestry

Top 5 · ancestry
  1. Australian40.1%
  2. English36.6%
  3. Irish13.2%
  4. Scottish10.7%
  5. Macedonian5.7%

Languages at home

Top 5 · languages at home
  1. Macedonian4.2%
  2. Italian1.8%
  3. Serbian1.8%
  4. Spanish1.5%
  5. Arabic1.2%

Country of birth

Top 5 · country of birth
  1. England3.4%
  2. North Macedonia3.4%
  3. Italy1.8%
  4. Croatia1.1%
  5. New Zealand1.1%

Source: ABS Census 2021, via Censible. How the figures are built

Around Mount Saint Thomas

The places it belongs to, sits beside and contains.

Part of

Nearby

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