2331 Postcode — Leiden, South Holland

English Nederlands

4-digit postcode 2331 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: 10,660
Households: 4,760
Average property value: €426,000
Owner-occupied: 60%
Average household size: 2.2
Urbanity: Strongly urban

Where 2331 is

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

People

Residents	10,660
Men	5,275
Women	5,385
Under 15	1,510
15 to 25	1,120
25 to 45	2,450
45 to 65	3,170
65 and over	2,415
Born abroad, in Europe	0%
Born abroad, outside Europe	10%

Households

Households	4,760
Average size	2.2
One-person households	30.5%1,450
Couples without children	1,600
One-parent families	8%380
Two-parent families	1,325

Housing

Homes	4,705
Average property value (WOZ)	€426,000
Owner-occupied	60%
Rented	40%
Housing-association homes	1,665
Flats and shared buildings	26.2%1,235
Built before 1945	2.1%100
Unoccupied	1.7%80

Area

Addresses per square kilometre	2,179
Urbanity	Strongly urban
Residents on unemployment, disability or income support	6.3%675

Against the national median

The tick is the national median.

Housing

Owner-occupied	60%
Rented	40%
Flats and shared buildings	26.2%
Built before 1945	2.1%
Unoccupied	1.7%

Households

One-person households	30.5%
One-parent families	8%
Residents on unemployment, disability or income support	6.3%

Age bands

Under 15	14.1585%
15 to 25	10.5016%
25 to 45	22.9723%
45 to 65	29.7234%
65 and over	22.6442%

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.