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Kromme Aar

Kromme Aar is a neighbourhood in the Zegersloot district of Alphen aan den Rijn, with 35 residents and 11 homes. From a typical postcode here, 73 everyday services are within a 15-minute walk.

Neighbourhood 04840307 · 1 postcode · Updated 24 October 2026
35residents1 January 2025
11homesCBS
50%green within 500 mAlphen aan den Rijn: 24%
73services within 15 minutesmedian postcode
Kromme Aar in Alphen aan den RijnPostcodes in Kromme Aar highlighted; the rest of Alphen aan den Rijn in grey
Map of Alphen aan den Rijn with Kromme Aar highlighted

Who lives here.

35 residents in 15 households, 3.0 people per household on average; next to the figure for Alphen aan den Rijn.

0%
aged 0–14
14%
aged 15–24
14%
aged 25–44
14%
aged 65 and over
33%
one-person households
67%
households with children

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Homes.

The housing stock of Kromme Aar on 1 January 2025.

11homes1 newly built in 2025
870 m³gas per home per yearAlphen aan den Rijn: 780 m³
3,960 kWhelectricity per home per yearAlphen aan den Rijn: 2,600 kWh

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Safety.

Police registered 20 crimes in Kromme Aar in 2025, 33% more than in 2024.

Assault5
Theft of bicycles and mopeds3
Other property crime2
Driving under the influence2
Vandalism and criminal damage1

Registered crime shows what becomes known to the police, not how safe a place feels, and not every crime is reported. Town centres, shopping areas and the streets around stations have few residents but many visitors, which pushes the rate per 1,000 residents up. The categories above are a selection; the total includes every registered crime.

Source: Dutch Police, registered crime by district and neighbourhood, 2024–2025 (CC BY 4.0)

Everyday distances.

Average distance by road for everyone living in Kromme Aar, a not urban area.

Distance to

GP practice2.1 km
Large supermarket2.2 km
Day nursery1.4 km
Primary school2.3 km

Also

Primary schools within 3 km1.4
Primary pupils living here0
Secondary pupils living here0
Business premises15
Residents per km²22
Land area153 ha

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

The surrounding area in figures.

Kromme Aar has only 35 residents. Statistics Netherlands only publishes figures on people and homes above a minimum count, to protect privacy, so the Zegersloot district and Alphen aan den Rijn as a whole are shown below.

Zegersloot district

Residents10,170
Households4,460
Average WOZ home value€342,000
Owner-occupied homes62%
Aged 65 and over21%
Green space within 500 m29%
Services within 15 minutes109

Alphen aan den Rijn

Residents115,773
Households51,011
Average WOZ home value€397,000
Owner-occupied homes64%
Aged 65 and over21%
Green space within 500 m24%
Services within 15 minutes107

Residential neighbourhoods nearby

Weidebloemenbuurt-ZuidWeidebloemenbuurt-NoordEricaparkPaddestoelenbuurtEdelstenenbuurtBurgtenbuurt

Source: Statistics Netherlands (CBS), Key figures for districts and neighbourhoods 2025 (CC BY 4.0)

Nearby neighbourhoods.

The closest neighbourhoods in Alphen aan den Rijn.

Weidebloemenbuurt-ZuidWeidebloemenbuurt-NoordEricaparkPaddestoelenbuurtEdelstenenbuurtBurgtenbuurtZegersloot district