1521 Postcode — Westknollendam, North Holland

English Nederlands

4-digit postcode 1521 covers Westknollendam, North 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: 12,205
Households: 6,140
Average property value: €334,000
Owner-occupied: 50%
Average household size: 2
Urbanity: Strongly urban

Where 1521 is

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

People

Residents	12,205
Men	5,950
Women	6,255
Under 15	1,730
15 to 25	1,270
25 to 45	3,410
45 to 65	3,140
65 and over	2,655
Born abroad, in Europe	10%
Born abroad, outside Europe	10%

Households

Households	6,140
Average size	2
One-person households	44.5%2,735
Couples without children	1,565
One-parent families	10.7%655
Two-parent families	1,185

Housing

Homes	6,170
Average property value (WOZ)	€334,000
Owner-occupied	50%
Rented	50%
Housing-association homes	2,495
Flats and shared buildings	44%2,715
Built before 1945	29.2%1,800
Unoccupied	4.1%255

Area

Addresses per square kilometre	1,784
Urbanity	Strongly urban
Residents on unemployment, disability or income support	9.5%1,165

Against the national median

The tick is the national median.

Housing

Owner-occupied	50%
Rented	50%
Flats and shared buildings	44%
Built before 1945	29.2%
Unoccupied	4.1%

Households

One-person households	44.5%
One-parent families	10.7%
Residents on unemployment, disability or income support	9.5%

Age bands

Under 15	14.1745%
15 to 25	10.4056%
25 to 45	27.9394%
45 to 65	25.7272%
65 and over	21.7534%

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.