2311 Postcode — Leiden, South Holland

English Nederlands

4-digit postcode 2311 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: 11,435
Households: 8,150
Average property value: €493,000
Owner-occupied: 30%
Average household size: 1.4
Urbanity: Very strongly urban

Where 2311 is

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

People

Residents	11,435
Men	5,370
Women	6,060
Under 15	660
15 to 25	3,890
25 to 45	3,715
45 to 65	1,895
65 and over	1,270
Born abroad, in Europe	10%
Born abroad, outside Europe	10%

Households

Households	8,150
Average size	1.4
One-person households	74.8%6,095
Couples without children	1,380
One-parent families	2.1%170
Two-parent families	510

Housing

Homes	5,290
Average property value (WOZ)	€493,000
Owner-occupied	30%
Rented	70%
Housing-association homes	1,000
Flats and shared buildings	64.8%3,430
Built before 1945	78.4%4,145
Unoccupied	7.2%380

Area

Addresses per square kilometre	5,698
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	3.5%400

Against the national median

The tick is the national median.

Housing

Owner-occupied	30%
Rented	70%
Flats and shared buildings	64.8%
Built before 1945	78.4%
Unoccupied	7.2%

Households

One-person households	74.8%
One-parent families	2.1%
Residents on unemployment, disability or income support	3.5%

Age bands

Under 15	5.77428%
15 to 25	34.0332%
25 to 45	32.5022%
45 to 65	16.5792%
65 and over	11.1111%

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.