9991 Postcode — Middelstum, Groningen

English Nederlands

4-digit postcode 9991 covers Middelstum, Groningen. 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: 2,155
Households: 980
Average property value: €243,000
Owner-occupied: 50%
Average household size: 2.2
Urbanity: Not urban

Where 9991 is

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

People

Residents	2,155
Men	1,080
Women	1,070
Under 15	335
15 to 25	225
25 to 45	485
45 to 65	570
65 and over	540
Born abroad, in Europe	0%
Born abroad, outside Europe	0%

Households

Households	980
Average size	2.2
One-person households	35.7%350
Couples without children	325
One-parent families	6.1%60
Two-parent families	245

Housing

Homes	1,170
Average property value (WOZ)	€243,000
Owner-occupied	50%
Rented	50%
Housing-association homes	350
Flats and shared buildings	16.7%195
Built before 1945	26.9%315
Unoccupied	15.4%180

Area

Addresses per square kilometre	332
Urbanity	Not urban
Residents on unemployment, disability or income support	9.3%200

Against the national median

The tick is the national median.

Housing

Owner-occupied	50%
Rented	50%
Flats and shared buildings	16.7%
Built before 1945	26.9%
Unoccupied	15.4%

Households

One-person households	35.7%
One-parent families	6.1%
Residents on unemployment, disability or income support	9.3%

Age bands

Under 15	15.5452%
15 to 25	10.4408%
25 to 45	22.5058%
45 to 65	26.4501%
65 and over	25.058%

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.