3123 Postcode — Schiedam, South Holland

English Nederlands

4-digit postcode 3123 covers Schiedam, South Holland. Dutch postcodes are four digits and two letters. The four digits identify a delivery area, and it is the level Statistics Netherlands publishes against, so the figures below describe this postcode itself rather than the town around it.

Residents: 7,365
Households: 3,345
Average property value: €346,000
Owner-occupied: 60%
Average household size: 2.2
Urbanity: Very strongly urban

Where 3123 is

Schiedam, South Holland — the point recorded for this postal code. It marks the centre of the code, not its boundary.

People

Residents	7,365
Men	3,540
Women	3,825
Under 15	1,095
15 to 25	785
25 to 45	1,675
45 to 65	1,805
65 and over	2,005
Born abroad, in Europe	0%
Born abroad, outside Europe	10%

Households

Households	3,345
Average size	2.2
One-person households	36.8%1,230
Couples without children	940
One-parent families	8.1%270
Two-parent families	900

Housing

Homes	3,330
Average property value (WOZ)	€346,000
Owner-occupied	60%
Rented	40%
Housing-association homes	1,160
Flats and shared buildings	43.5%1,450
Built before 1945	0.3%10
Unoccupied	1.4%45

Area

Addresses per square kilometre	2,606
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	5%370

Against the national median

The tick is the national median.

Housing

Owner-occupied	60%
Rented	40%
Flats and shared buildings	43.5%
Built before 1945	0.3%
Unoccupied	1.4%

Households

One-person households	36.8%
One-parent families	8.1%
Residents on unemployment, disability or income support	5%

Age bands

Under 15	14.8676%
15 to 25	10.6585%
25 to 45	22.7427%
45 to 65	24.5078%
65 and over	27.2234%

Figures from Statistics Netherlands (CBS), key figures per postcode, 1 January 2025. CBS withholds figures for areas with too few residents to publish safely, so a missing value here means withheld, not zero.