Isaac

Queensland · Mackay - Isaac - Whitsunday · 22,035 people · 62 suburbs · 13 postcodes

Isaac at a glance

22,035

Population

#30 of 69 in QLD

58,499

km² area

0/km² density

34.0

Median age

-5.3 vs QLD

$2,557

Median HH income/wk

#2 of 69 in QLD

972

SEIFA IRSAD

#9 of 69 in QLD

Schools

17 gov, 1 Cath, 0 indep

9.7%

Born overseas

60.4%

Renting

Map shows the Isaac LGA boundary in blue with a marker per suburb. Hover for suburb name, click for details.

Marker colour reflects SEIFA IRSAD decile: ● 1-2 (most disadvantaged), ● 3-4, ● 5-6, ● 7-8, ● 9-10 (most advantaged).

Boundary source: ABS ASGS 2021. Map tiles: OpenStreetMap contributors.

Isaac is a Local Government Area in Queensland, in the Brisbane region. It covers 62 suburbs across 13 postcodes and an area of 58,499 km². Isaac has a population of 22,035 , ranking #30 most populous in QLD. The most populous suburb is Moranbah (9,425 residents), and the highest median household income is in Kemmis at $4,250/week. The LGA-wide median household income is $2,557/week and median age is 34.0. About 9.7% of residents were born overseas and 4.8% speak a language other than English at home.

Who lives here

Age structure

21.4%

11.6%

35.3%

25.0%

6.7%

0–14 (21.4%) 15–24 (11.6%) 25–44 (35.3%) 45–64 (25.0%) 65+ (6.7%)

Show counts

0–14 years	4,708 (21.4%)
15–24 years	2,541 (11.6%)
25–44 years	7,745 (35.3%)
45–64 years	5,501 (25.0%)
65+ years	1,470 (6.7%)

9.7%

Born overseas

4.8%

Speak a language other than English at home

5.2%

First Nations

2.6

Avg household size

How they live

Housing tenure

20.0%

19.7%

60.4%

Owned outright (20.0%) Mortgaged (19.7%) Renting (60.4%)

Dwelling type mix

91.7%

Separate house (91.7%) Semi/townhouse (7.4%) Flat/apartment (0.9%)

$134

Median weekly rent

$1,216

Median monthly mortgage

32.2%

Households with 0-1 cars

67.8%

Households with 2+ cars

Work and learning

2.3%

Unemployment rate

7,614

In full-time work

2,158

In part-time work

Schools in Isaac

18 schools across Isaac: 94.4% Government, 5.6% Catholic, 0% Independent. The QLD average is 69.8% / 17.1% / 13.1%. Schools here have a median ICSEA of 950 (range 823 to 1001). QLD median is 985; national mean is 1000.

Sector mix

94.4%

QLD average for comparison

69.8%

17.1%

13.1%

Government Catholic Independent

Type breakdown

72.2%

16.7%

11.1%

Primary (72.2%) Secondary (16.7%) Combined (11.1%) Special (0%)

ICSEA range

700 National mean 1000 1300

LGA median 950 QLD median 985LGA range 823 to 1001

ICSEA (Index of Community Socio-Educational Advantage) summarises the socio-economic background of each school's families. Higher values indicate more advantage. Source: ACARA 2025.

All 18 schools in Isaac, sorted by enrolment:

School	Sector	Type	Suburb	Students	ICSEA
Moranbah State High School	Government	Secondary	Moranbah	756	949
Moranbah East State School	Government	Primary	Moranbah	610	952
Moranbah State School	Government	Primary	Moranbah	531	957
Dysart State School	Government	Primary	Dysart	254	907
Middlemount Community School	Government	Combined	Middlemount	252	951
Dysart State High School	Government	Secondary	Dysart	197	900
Clermont State High School	Government	Secondary	Clermont	171	924
St Joseph's Catholic Primary School	Catholic	Primary	Clermont	165	986
Clermont State School	Government	Primary	Clermont	163	936
Nebo State School	Government	Primary	Nebo	93	899
Glenden State School	Government	Combined	Glenden	39	957
Kilcummin State School	Government	Primary	Kilcummin	32	988
Carmila State School	Government	Primary	Carmila	27	931
Clarke Creek State School	Government	Primary	Clarke Creek	20	1001
Coppabella State School	Government	Primary	Coppabella	19	823
Valkyrie State School	Government	Primary	Valkyrie	14	963
Mistake Creek State School	Government	Primary	Clermont	6
St Lawrence State School	Government	Primary	St Lawrence	6

Source: ACARA School Profiles 2025. ICSEA shown where reported; some schools (notably small primaries) do not publish ICSEA.

SEIFA socio-economic indexes

SEIFA 2021 ranks Australian areas across four dimensions. Scores are population-weighted averages of suburb-level SEIFA scores within Isaac. Higher scores indicate more advantage; the national mean is 1000.

IRSAD

Relative socio-economic advantage and disadvantage

972

Ranked #9 of 69 QLD LGAs

IRSD

Relative disadvantage only (lower = more disadvantaged)

1012

IER

Economic resources: income, wealth, housing

992

IEO

Education and occupation: qualifications, skill levels

905

Suburbs in Isaac

Isaac contains 62 suburbs and 13 postcodes. Sorted by population.

Suburb	Postcode	Population	Median income	Median age
Moranbah	4744	9,425	$3,079/wk	31
Clermont	4721	2,952	$1,867/wk	36
Dysart	4745	2,918	$2,444/wk	32
Middlemount	4746	1,899	$2,721/wk	32
Nebo	4742	857	$1,981/wk	37
Coppabella	4741	594	$3,083/wk	36
Glenden	4743	477	$2,411/wk	35
Ilbilbie	4738	385	$1,222/wk	53
Carmila	4739	340	$966/wk	54
Belyando	4721	307	$1,624/wk	39
St Lawrence	4707	245	$1,031/wk	52
Kilcummin	4721	228	$2,028/wk	32
Hail Creek	4742	179	$3,499/wk	35
Clairview	4741	167	$1,015/wk	61
Lotus Creek	4705	113	$1,800/wk	33
Frankfield	4721	100	$1,875/wk	32
May Downs	4746	93	$2,187/wk	38
Mackenzie River	4705	84	$1,812/wk	44
Wolfang	4721	84	$2,125/wk	39
Blue Mountain	4737	83	$1,531/wk	44
Pasha	4721	75	$2,124/wk	30
Suttor	4743	75	$1,125/wk	35
Valkyrie	4742	71	$2,624/wk	37
Gemini Mountains	4721	65	$1,625/wk	43
Elgin	4721	52	$1,187/wk	31
Oxford	4742	43	$1,562/wk	41
Clarke Creek	4705	32	$2,624/wk	46
Epsom	4741	21	$4,083/wk	49
Laglan	4721	21	$2,249/wk	41
Winchester	4721	13	$2,249/wk	29
Strathfield	4742	8	$1,999/wk	60
Burton	4742	7	$1,625/wk	33
Kemmis	4742	6	$4,250/wk	60
Turrawulla	4742	5	$2,124/wk	75
Mount Britton	4742	4		57
The Percy Group	4707	4	$900/wk	64
Eaglefield	4742	3	$2,250/wk	39
Beaufort	4724
Brampton Island	4741
Collaroy	4707		$725/wk	70
Colston Park	4737
Daydream Island	4741
Drummondslope	4724
Eton North	4741
Flaggy Rock	4741
Grasstree	4737
Hook Island	4741
Kalarka	4741
Lindeman Island	4741
Long Island	4741
Mount Christian	4741
Mt Britton	4742
Norwich Park	4745
Orkabie	4741
Peak Downs Mine	4744
Plane Creek West	4737
Port Wine	4724
Quetta	4724
Sedgeford	4724
Shinfield	4737
South Molle	4741
Surbiton	4724

Postcodes covered

4705, 4707, 4721, 4724, 4737, 4738, 4739, 4741, 4742, 4743, 4744, 4745, 4746

Compare Isaac with neighbouring LGAs

Side-by-side demographic and socio-economic snapshot of Isaac and its closest neighbouring LGAs.

LGA	Population	Median age	Median HH income	SEIFA IRSAD	% renting	% overseas-born
Isaac (QLD)	22,035	34.0	$2,557/wk	972	60.4%	9.7%
Mackay	115,681	38.6	$1,892/wk	960	30.2%	11.9%
Central Highlands (Qld)	27,760	34.6	$2,116/wk	961	44.7%	11.7%
Whitsunday	36,805	40.6	$1,530/wk	944	35.4%	16.4%
Livingstone	39,153	43.8	$1,737/wk	970	22.4%	10.1%
Barcaldine	2,858	42.6	$1,437/wk	971	28.5%	5.2%

Services and amenities

NDIS Providers NDIS provider directory for Isaac Climate & weather Climate data for Moranbah

Frequently asked questions about Isaac

What is the population of Isaac?

The 2021 Census recorded 22,035 people living in Isaac, across 62 suburbs.

What suburbs are in Isaac?

Isaac contains 62 suburbs. The most populous are Moranbah, Clermont, Dysart, Middlemount, Nebo.See the full list in the Suburbs section above.

What postcodes are in Isaac?

Isaac covers 13 postcodes: 4705, 4707, 4721, 4724, 4737, 4738, 4739, 4741, 4742, 4743, 4744, 4745, 4746.

What is the median household income in Isaac?

The population-weighted median household income across Isaac is $2,557 per week (2021 Census), ranking #2 of 69 QLD LGAs.

How many schools are in Isaac?

Isaac has 18 schools, including 17 government, 1 Catholic, and 0 independent schools (ACARA 2025).

What is the SEIFA score for Isaac?

Isaac has a population-weighted SEIFA IRSAD score of 972, where the national average is 1000. Higher scores indicate more relative advantage.

Page last reviewed June 2026. Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 (IRSD, IRSAD, IER, IEO), ACARA School Profiles 2025, ABS ASGS 2021 LGA boundaries. How this data is sourced.