2321 Postcode — Leiden, South Holland

English Nederlands

4-digit postcode 2321 covers Leiden, 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: 13,465
Households: 8,345
Average property value: €337,000
Owner-occupied: 20%
Average household size: 1.6
Urbanity: Very strongly urban

Where 2321 is

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

People

Residents	13,465
Men	6,615
Women	6,850
Under 15	1,330
15 to 25	2,320
25 to 45	5,740
45 to 65	2,480
65 and over	1,595
Born abroad, in Europe	10%
Born abroad, outside Europe	20%

Households

Households	8,345
Average size	1.6
One-person households	62.2%5,190
Couples without children	1,890
One-parent families	4.4%370
Two-parent families	895

Housing

Homes	8,035
Average property value (WOZ)	€337,000
Owner-occupied	20%
Rented	80%
Housing-association homes	2,285
Flats and shared buildings	80%6,425
Built before 1945	5.8%465
Unoccupied	3%245

Area

Addresses per square kilometre	3,943
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	8.2%1,100

Against the national median

The tick is the national median.

Housing

Owner-occupied	20%
Rented	80%
Flats and shared buildings	80%
Built before 1945	5.8%
Unoccupied	3%

Households

One-person households	62.2%
One-parent families	4.4%
Residents on unemployment, disability or income support	8.2%

Age bands

Under 15	9.87746%
15 to 25	17.2299%
25 to 45	42.629%
45 to 65	18.4181%
65 and over	11.8455%

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.