2421 Postcode — Nieuwkoop, South Holland

English Nederlands

4-digit postcode 2421 covers Nieuwkoop, 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: 9,350
Households: 3,955
Average property value: €490,000
Owner-occupied: 70%
Average household size: 2.3
Urbanity: Little urban

Where 2421 is

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

People

Residents	9,350
Men	4,630
Women	4,720
Under 15	1,450
15 to 25	1,060
25 to 45	2,090
45 to 65	2,535
65 and over	2,220
Born abroad, in Europe	0%
Born abroad, outside Europe	0%

Households

Households	3,955
Average size	2.3
One-person households	29.8%1,180
Couples without children	1,300
One-parent families	5.9%235
Two-parent families	1,235

Housing

Homes	3,900
Average property value (WOZ)	€490,000
Owner-occupied	70%
Rented	30%
Housing-association homes	855
Flats and shared buildings	14%545
Built before 1945	4.6%180
Unoccupied	3.1%120

Area

Addresses per square kilometre	777
Urbanity	Little urban
Residents on unemployment, disability or income support	4.2%395

Against the national median

The tick is the national median.

Housing

Owner-occupied	70%
Rented	30%
Flats and shared buildings	14%
Built before 1945	4.6%
Unoccupied	3.1%

Households

One-person households	29.8%
One-parent families	5.9%
Residents on unemployment, disability or income support	4.2%

Age bands

Under 15	15.4997%
15 to 25	11.3308%
25 to 45	22.341%
45 to 65	27.0978%
65 and over	23.7306%

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.