3721 Postcode — Bilthoven, Utrecht

English Nederlands

4-digit postcode 3721 covers Bilthoven, 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: 8,470
Households: 3,895
Average property value: €475,000
Owner-occupied: 50%
Average household size: 2.2
Urbanity: Strongly urban

Where 3721 is

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

People

Residents	8,470
Men	4,065
Women	4,405
Under 15	1,655
15 to 25	880
25 to 45	2,035
45 to 65	2,200
65 and over	1,700
Born abroad, in Europe	0%
Born abroad, outside Europe	10%

Households

Households	3,895
Average size	2.2
One-person households	39.9%1,555
Couples without children	890
One-parent families	11%430
Two-parent families	1,015

Housing

Homes	3,955
Average property value (WOZ)	€475,000
Owner-occupied	50%
Rented	50%
Housing-association homes	1,950
Flats and shared buildings	49.4%1,955
Built before 1945	21.1%835
Unoccupied	4.6%180

Area

Addresses per square kilometre	1,866
Urbanity	Strongly urban
Residents on unemployment, disability or income support	9.3%790

Against the national median

The tick is the national median.

Housing

Owner-occupied	50%
Rented	50%
Flats and shared buildings	49.4%
Built before 1945	21.1%
Unoccupied	4.6%

Households

One-person households	39.9%
One-parent families	11%
Residents on unemployment, disability or income support	9.3%

Age bands

Under 15	19.5396%
15 to 25	10.3896%
25 to 45	24.026%
45 to 65	25.974%
65 and over	20.0708%

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.