1821 Postcode — Alkmaar, North Holland

English Nederlands

4-digit postcode 1821 covers Alkmaar, 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: 1,730
Households: 905
Average property value: €370,000
Owner-occupied: 50%
Average household size: 1.9
Urbanity: Very strongly urban

Where 1821 is

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

People

Residents	1,730
Men	875
Women	855
Under 15	245
15 to 25	155
25 to 45	520
45 to 65	460
65 and over	350
Born abroad, in Europe	0%
Born abroad, outside Europe	10%

Households

Households	905
Average size	1.9
One-person households	47.5%430
Couples without children	245
One-parent families	7.2%65
Two-parent families	165

Housing

Homes	845
Average property value (WOZ)	€370,000
Owner-occupied	50%
Rented	50%
Housing-association homes	275
Flats and shared buildings	48.5%410
Built before 1945	30.2%255
Unoccupied	3%25

Area

Addresses per square kilometre	3,004
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	9.2%160

Against the national median

The tick is the national median.

Housing

Owner-occupied	50%
Rented	50%
Flats and shared buildings	48.5%
Built before 1945	30.2%
Unoccupied	3%

Households

One-person households	47.5%
One-parent families	7.2%
Residents on unemployment, disability or income support	9.2%

Age bands

Under 15	14.1618%
15 to 25	8.95954%
25 to 45	30.0578%
45 to 65	26.5896%
65 and over	20.2312%

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.