Postal Codes

2221 Postcode

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English Nederlands

4-digit postcode 2221 covers Katwijk, 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
13,360
Households
5,725
Average property value
€389,000
Owner-occupied
60%
Average household size
2.3
Urbanity
Strongly urban

Where 2221 is

Katwijk, South Holland โ€” the point recorded for this postal code. It marks the centre of the code, not its boundary.

People
Residents13,360
Men6,720
Women6,640
Under 152,250
15 to 251,625
25 to 453,575
45 to 653,155
65 and over2,755
Born abroad, in Europe0%
Born abroad, outside Europe10%
Households
Households5,725
Average size2.3
One-person households34.6%1,980
Couples without children1,590
One-parent families6.7%385
Two-parent families1,765
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Housing
Homes5,860
Average property value (WOZ)€389,000
Owner-occupied60%
Rented40%
Housing-association homes2,080
Flats and shared buildings51.1%2,995
Unoccupied2%115
Area
Addresses per square kilometre2,396
UrbanityStrongly urban
Residents on unemployment, disability or income support6%795
Against the national median
Residents13,360Average property value€389,000Average household size2.3One-person households34.6%

The tick is the national median.

Housing
Owner-occupied60%
Rented40%
Flats and shared buildings51.1%
Unoccupied2%
Households
One-person households34.6%
One-parent families6.7%
Residents on unemployment, disability or income support6%
Age bands
Under 1516.8413%
15 to 2512.1632%
25 to 4526.759%
45 to 6523.6153%
65 and over20.6213%

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.

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