3815 Postcode — Amersfoort, Utrecht

English Nederlands

4-digit postcode 3815 covers Amersfoort, 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: 11,715
Households: 5,405
Average property value: €354,000
Owner-occupied: 50%
Average household size: 2.2
Urbanity: Very strongly urban

Where 3815 is

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

People

Residents	11,715
Men	5,845
Women	5,870
Under 15	1,990
15 to 25	1,480
25 to 45	3,485
45 to 65	2,670
65 and over	2,090
Born abroad, in Europe	0%
Born abroad, outside Europe	20%

Households

Households	5,405
Average size	2.2
One-person households	40.1%2,170
Couples without children	1,470
One-parent families	9.7%525
Two-parent families	1,240

Housing

Homes	5,315
Average property value (WOZ)	€354,000
Owner-occupied	50%
Rented	50%
Housing-association homes	2,325
Flats and shared buildings	51.7%2,750
Built before 1945	0.3%15
Unoccupied	2.4%125

Area

Addresses per square kilometre	2,830
Urbanity	Very strongly urban
Residents on unemployment, disability or income support	10.8%1,260

Against the national median

The tick is the national median.

Housing

Owner-occupied	50%
Rented	50%
Flats and shared buildings	51.7%
Built before 1945	0.3%
Unoccupied	2.4%

Households

One-person households	40.1%
One-parent families	9.7%
Residents on unemployment, disability or income support	10.8%

Age bands

Under 15	16.9868%
15 to 25	12.6334%
25 to 45	29.7482%
45 to 65	22.7913%
65 and over	17.8404%

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.