Population
+0.3% since 2016.
Mount Isa, QLD
Mount Isa had a population of 18,727 at the 2021 Census (+0.3% since 2016). Median age 31.7. Median weekly household income $2,235. Source: ABS Census 2021, via Censible. Census 2026 data arrives June 2027.
Mount Isa at a glance
What the 2021 Census says, compared with Queensland.
Between the 2016 and 2021 censuses, Mount Isa's population grew by 0.3% to 18,727, slower than Queensland as a whole (+9.6%). With a median age of 31.7, it is younger than the QLD average (38.2). Children under 10 make up 16.2% of residents, and people aged 70 and over 5.3%.
47.6% of households rent, a larger share than the QLD average of 33.6%. 17.2% own their home outright. Almost every home is a house; flats and apartments are 4.2% of homes. The 2021 Census counted 6,416 households.
The median household earns $2,235 a week, above the QLD average of $1,676. Renters pay a median $274 a week, and households with a mortgage repay $1,545 a month.
18.1% of residents were born overseas, fewer than the QLD average of 24.1%. 10.8% use a language other than English at home. 45.8% report no religion, close to the QLD average (44.8%).
Key figures
2021 Census, Mount Isa beside QLD and Australia.
| Measure | Mount Isa | QLD | Australia |
|---|---|---|---|
| Population | 18,727 | 5,156,158 | 25,422,828 |
| Growth since 2016 | +0.3% | +9.6% | +8.6% |
| Median age | 31.7 | 38.2 | 38.2 |
| Households | 6,416 | 1,869,452 | 9,275,123 |
| Flats and apartments | 4.2% | 12.5% | 14.3% |
| Renting | 47.6% | 33.6% | 31.1% |
| Owned outright | 17.2% | 29.5% | 31.4% |
| Median household income a week | $2,235 | $1,676 | $1,747 |
| Median rent a week | $274 | $364 | $376 |
| Median mortgage repayment a month | $1,545 | $1,740 | $1,866 |
| Born overseas | 18.1% | 24.1% | 29.3% |
| Other language at home | 10.8% | 14.1% | 23.6% |
| No religion | 45.8% | 44.8% | 41.9% |
Source: ABS Census 2021, via Censible. How the figures are built
Population and age
Each census since 2011, and the age profile in 2021.
Age
Median age 31.7, against 38.2 for Queensland.
Source: ABS Census 2021, via Censible. How the figures are built
Cultural background
The largest groups in Mount Isa at the 2021 Census.
Ancestry
Languages at home
Country of birth
Source: ABS Census 2021, via Censible. How the figures are built
Around Mount Isa
The places it belongs to, sits beside and contains.
Explore Mount Isa in Censible
Every census figure for Mount Isa, mapped and compared with any other place. A free account takes a minute.