9121 Postcode
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English Nederlands
4-digit postcode 9121 covers Aalsum, Friesland. 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
- 110
- Households
- 45
- Average property value
- €433,000
- Owner-occupied
- 80%
- Average household size
- 2.4
- Urbanity
- Not urban
Where 9121 is
Aalsum, Friesland — the point recorded for this postal code. It marks the centre of the code, not its boundary.
People
| Residents | 110 |
|---|---|
| Men | 60 |
| Women | 50 |
| Under 15 | 10 |
| 15 to 25 | 10 |
| 25 to 45 | 25 |
| 45 to 65 | 25 |
| 65 and over | 40 |
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Households
| Households | 45 |
|---|---|
| Average size | 2.4 |
| One-person households | 11.1%5 |
| Couples without children | 20 |
| Two-parent families | 15 |
Housing
| Homes | 45 |
|---|---|
| Average property value (WOZ) | €433,000 |
| Owner-occupied | 80% |
| Built before 1945 | 66.7%30 |
Area
| Addresses per square kilometre | 125 |
|---|---|
| Urbanity | Not urban |
The tick is the national median.
| Owner-occupied | |
|---|---|
| Built before 1945 |
| Under 15 | |
|---|---|
| 15 to 25 | |
| 25 to 45 | |
| 45 to 65 | |
| 65 and over |
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.
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