3146 Postcode — Maassluis, South Holland

English Nederlands

4-digit postcode 3146 covers Maassluis, 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: 4,810
Households: 2,010
Average property value: €376,000
Owner-occupied: 80%
Average household size: 2.3
Urbanity: Moderately urban

Where 3146 is

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

People

Residents	4,810
Men	2,415
Women	2,395
Under 15	710
15 to 25	470
25 to 45	1,065
45 to 65	1,330
65 and over	1,235
Born abroad, in Europe	10%
Born abroad, outside Europe	10%

Households

Households	2,010
Average size	2.3
One-person households	23.1%465
Couples without children	795
One-parent families	7.5%150
Two-parent families	595

Housing

Homes	1,995
Average property value (WOZ)	€376,000
Owner-occupied	80%
Rented	20%
Housing-association homes	370
Flats and shared buildings	17%340
Built before 1945	0.3%5
Unoccupied	1.8%35

Area

Addresses per square kilometre	1,272
Urbanity	Moderately urban
Residents on unemployment, disability or income support	5%240

Against the national median

The tick is the national median.

Housing

Owner-occupied	80%
Rented	20%
Flats and shared buildings	17%
Built before 1945	0.3%
Unoccupied	1.8%

Households

One-person households	23.1%
One-parent families	7.5%
Residents on unemployment, disability or income support	5%

Age bands

Under 15	14.7609%
15 to 25	9.77131%
25 to 45	22.1414%
45 to 65	27.6507%
65 and over	25.6757%

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.