Oldest postcodes

The 20 postcodes in Western Australia with the highest median age, and the 20 with the lowest, out of 248 with a published figure.

	Place	State	Postcode	Median age
1	Leeman	Western Australia	6514	61.0
2	Leeuwin	Western Australia	6290	61.0
3	Southampton	Western Australia	6253	58.0
4	Walpole	Western Australia	6398	58.0
5	Carlotta	Western Australia	6275	56.0
6	East Beverley	Western Australia	6304	56.0
7	Quellington	Western Australia	6302	56.0
8	Jandabup	Western Australia	6077	55.0
9	Mawson	Western Australia	6383	55.0
10	Yallabatharra	Western Australia	6535	55.0
11	Carani	Western Australia	6566	54.0
12	Crowea	Western Australia	6262	54.0
13	Karakin	Western Australia	6044	54.0
14	Kendenup	Western Australia	6323	54.0
15	Bonniefield	Western Australia	6525	53.0
16	Zuytdorp	Western Australia	6536	53.0
17	Jurien Bay	Western Australia	6516	52.0
18	North Kellerberrin	Western Australia	6410	52.0
19	Furnissdale	Western Australia	6209	51.0
20	Guilderton	Western Australia	6041	51.0

Youngest postcodes

	Place	State	Postcode	Median age
1	Eglinton	Western Australia	6034	29.0
2	Ord River	Western Australia	6770	29.0
3	Golden Bay	Western Australia	6174	30.0
4	Karnup	Western Australia	6176	30.0
5	Leinster	Western Australia	6437	30.0
6	Alkimos	Western Australia	6038	31.0
7	Baldivis	Western Australia	6171	31.0
8	Fitzroy Crossing	Western Australia	6765	31.0
9	Karrakup	Western Australia	6122	31.0
10	Leda	Western Australia	6170	31.0
11	Baynton	Western Australia	6714	32.0
12	Bentley South	Western Australia	6102	32.0
13	Cossack	Western Australia	6720	32.0
14	Finucane	Western Australia	6722	32.0
15	Jarlmadangah Burru	Western Australia	6728	32.0
16	Mundijong	Western Australia	6123	32.0
17	Neerabup	Western Australia	6031	32.0
18	Pannawonica	Western Australia	6716	32.0
19	Brookdale	Western Australia	6112	33.0
20	Bulong	Western Australia	6431	33.0

Oldest postcodes — All of Australia

Places with fewer than 500 residents are excluded: a figure drawn from a handful of people carries more uncertainty than the differences being ranked.