Dismal Swamp Postcode

South Australia

Outer Regional Above SA income

5291

Postcode for Dismal Swamp, SA
Phone area code: 08 · 362 km from Adelaide · Pop. 63

Population

Median Age

$1,916

Household Income/wk

$150

Median Rent/wk

6/10

SEIFA Advantage

63.1

Area (km²)

Income, rent and SEIFA figures are from the ABS 2021 Census and are reported in 2021 dollars, not adjusted for subsequent inflation.

Where Dismal Swamp ranks: household income is in the top 25% of SA suburbs.

How Dismal Swamp Compares

Dismal Swamp vs the SA average and the national average (2021 Census, population-weighted).

Metric	Dismal Swamp	SA avg	AU avg
Household income/wk	$1,916 +SA	$1,545	$1,836
Rent/wk	$150 -SA	$308	$390
Mortgage/month	$1,417 ≈SA	$1,558	$1,958
Median age	40	45.0	45.0
SEIFA decile	6/10 ≈SA	5.0/10	6.0/10
Unemployment	0.0% -SA	6.0%	5.0%

Green pill = at least 10% above the SA average; red = at least 10% below; grey = within 10%. For unemployment, colour polarity is inverted: lower is better.

Dismal Swamp is a locality 362 km from Adelaide in South Australia, classified as outer regional by the ABS. The postcode is 5291. It falls within the South Australia - South East region. The local government area is Grant.

According to the 2021 Census, Dismal Swamp has a population of 63 with a median age of 40. The median weekly household income is $1,916, above the SA average.

Housing in Dismal Swamp includes a median weekly rent of $150, median monthly mortgage repayment of $1,417, with 21 total dwellings. Housing costs in the area sit below the SA average. Rental properties account for 43.8% of dwellings.

On the SEIFA Index of Relative Socio-economic Advantage and Disadvantage, Dismal Swamp scores in decile 6 out of 10, which is around the national average.

Dismal Swamp is part of the Limestone Coast statistical area in South Australia.

Dismal Swamp Details

Postcode	5291
State	South Australia (SA)
Phone Area Code	08
Population (2021)	63
Median Age	40 years
Median Household Income (Census 2021)	$1,916/week
Median Personal Income (Census 2021)	$819/week
Median Weekly Rent (Census 2021)	$150
Median Monthly Mortgage (Census 2021)	$1,417
Average Household Size	3.2 persons
Area	63.1 km²
Population Density	1/km²
Total Dwellings	21
Australian Citizens	95.2%
Unemployment Rate	0.0%
SEIFA IRSAD Decile	6/10 (average)
Latitude	-37.7190482
Longitude	140.692407
Distance from Adelaide	362 km
Region (SA4)	South Australia - South East
Area (SA3)	Limestone Coast
Local Government	Grant
Federal Electorate	Barker

Age Profile

28.6%

17.5%

14.3%

31.7%

6.3%

0–14 (28.6%) 15–24 (17.5%) 25–44 (14.3%) 45–64 (31.7%) 65+ (6.3%)

Show counts

0–14 years	18 (28.6%)
15–24 years	11 (17.5%)
25–44 years	9 (14.3%)
45–64 years	20 (31.7%)
65+ years	4 (6.3%)

Housing Tenure

37.5%

18.8%

43.8%

Owned outright (37.5%) Mortgaged (18.8%) Rented (43.8%)

SEIFA Socio-economic Index

Index of Relative Socio-economic Advantage and Disadvantage (IRSAD), decile 6 of 10. Higher deciles indicate more advantage.

Health Conditions (2021 Census)

Arthritis	5 (7.9%)
Diabetes	3 (4.8%)
Asthma	3 (4.8%)
Heart Disease	3 (4.8%)

Long-term health conditions self-reported in the 2021 Census. Persons may report more than one condition.

Motor Vehicles per Dwelling

No vehicle	0 (0.0%)
1 vehicle	0 (0.0%)
2 vehicles	10 (52.6%)
3+ vehicles	9 (47.4%)

Suburbs Near Dismal Swamp

Wandilo 3.8 km Glencoe 9.0 km Mil-Lel 11.1 km Mil Lel 11.1 km Suttontown 11.1 km Compton 11.9 km Wepar 12.3 km Glencoe West 12.6 km Koorine 12.6 km Mingbool 12.9 km Tarpeena 13.0 km Mount Gambier 13.7 km

Same Postcode (5291)

More Dismal Swamp Data

Grant LGA 30 suburbs, 4 postcodes, 7,994 people Climate & Weather Closest station: Mount Gambier (14.5 km) NDIS Providers NDIS data for Grant LGA

Page last reviewed June 2026. Data sources: Australian Bureau of Statistics 2021 Census (CC BY 4.0), SEIFA 2021 IRSAD, ACARA school profiles 2025. How this data is sourced.