3603 Postcode — Maarssen, Utrecht

English Nederlands

4-digit postcode 3603 covers Maarssen, 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: 2,700
Households: 1,120
Average property value: €664,000
Owner-occupied: 80%
Average household size: 2.4
Urbanity: Strongly urban

Where 3603 is

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

People

Residents	2,700
Men	1,335
Women	1,365
Under 15	480
15 to 25	285
25 to 45	510
45 to 65	760
65 and over	660
Born abroad, in Europe	0%
Born abroad, outside Europe	0%

Households

Households	1,120
Average size	2.4
One-person households	30.4%340
Couples without children	360
One-parent families	5.4%60
Two-parent families	360

Housing

Homes	1,140
Average property value (WOZ)	€664,000
Owner-occupied	80%
Rented	20%
Housing-association homes	40
Flats and shared buildings	28.5%325
Built before 1945	30.7%350
Unoccupied	6.6%75

Area

Addresses per square kilometre	2,215
Urbanity	Strongly urban
Residents on unemployment, disability or income support	3.5%95

Against the national median

The tick is the national median.

Housing

Owner-occupied	80%
Rented	20%
Flats and shared buildings	28.5%
Built before 1945	30.7%
Unoccupied	6.6%

Households

One-person households	30.4%
One-parent families	5.4%
Residents on unemployment, disability or income support	3.5%

Age bands

Under 15	17.8108%
15 to 25	10.5751%
25 to 45	18.9239%
45 to 65	28.2004%
65 and over	24.4898%

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.