3521 Postcode — Utrecht, Utrecht

English Nederlands

4-digit postcode 3521 covers Utrecht, Utrecht. 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: 8,175
Households: 4,240
Average property value: €492,000
Owner-occupied: 40%
Average household size: 1.8
Urbanity: Very strongly urban

Where 3521 is

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

People

Residents	8,175
Men	4,265
Women	3,915
Under 15	815
15 to 25	1,045
25 to 45	4,335
45 to 65	1,475
65 and over	505
Born abroad, in Europe	10%
Born abroad, outside Europe	10%

Households

Households	4,240
Average size	1.8
One-person households	50.1%2,125
Couples without children	1,415
One-parent families	3.5%150
Two-parent families	550

Housing

Homes	3,520
Average property value (WOZ)	€492,000
Owner-occupied	40%
Rented	60%
Housing-association homes	315
Flats and shared buildings	81%2,850
Built before 1945	47.7%1,680
Unoccupied	5.3%185

Area

Addresses per square kilometre	4,470
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	8.3%675

Against the national median

The tick is the national median.

Housing

Owner-occupied	40%
Rented	60%
Flats and shared buildings	81%
Built before 1945	47.7%
Unoccupied	5.3%

Households

One-person households	50.1%
One-parent families	3.5%
Residents on unemployment, disability or income support	8.3%

Age bands

Under 15	9.96942%
15 to 25	12.7829%
25 to 45	53.0275%
45 to 65	18.0428%
65 and over	6.17737%

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.