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The population is growing faster than in Alphen aan den Rijn.
30 residents,
Get a full report on value, costs, energy and surroundings.
Compared with the municipality of Alphen aan den Rijn · newest year available
© Kadaster / PDOK, CBS
Kromme Aar has too few residents for a reliable rate per 1,000 residents (under 200), so counts are shown instead of a comparison. In 2025, 20 crimes were registered, against 9 in 2021. Crimes are counted where they happen, not where the offender lives.
20 crimes were registered in Kromme Aar in 2025 (9 in 2021).
Too few residents for a reliable per-1,000 figure (threshold 200) — registered crime, not all crime — CBS/Politie 47018NED.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
The largest category in Kromme Aar is 'Theft and burglary': 7 in 2025.
Too few residents for a reliable per-1,000 figure (threshold 200). Four categories are structurally withheld at buurt level (sex offences, child pornography, child prostitution, other integrity offences); the gap with the published total is shown under 'other'.
Source: CBS/Politie geregistreerde misdrijven (47018NED) 2025
In 2024, police in Kromme Aar registered 1 traffic accidents, of which 1 with injury and none fatal.
Registered accidents (BRON, Rijkswaterstaat); material-damage-only accidents have not been systematically registered since roughly 2010 and are not comparable between areas. This area shows only accidents with an exactly known location (roughly 80-85% of all registered accidents); the rest is known only at street, intersection or gemeente level. The comparison with the gemeente therefore also uses only the gemeente's exactly-located accidents, which is why that figure is lower than on the gemeente's own page.
Source: BRON — Bestand geRegistreerde Ongevallen Nederland (Rijkswaterstaat) 2024
Recreational land is the largest land use in Kromme Aar, covering 60% of the area, against 5% in Alphen aan den Rijn. Green space such as parks, sports fields, forest and nature covers 60% of the area, 52 percentage points above the 8% in Alphen aan den Rijn.
60% of the area is green (parks, sport, nature), against 8% in the municipality of Alphen aan den Rijn.
Every share is calculated as a percentage of the TOTAL area (land and water together, peiljaar 2022); water is therefore one of the slices itself, not a separate whole. Green is the sum of recreational terrain (parks, sport fields, allotments, day recreation) and natural terrain (forest, open natural terrain) — agricultural land is not counted as green here.
Source: CBS Bodemgebruik (86211NED) 2022
A daycare lies here at an average road distance of 1400 m.
| Distance | Value | |
|---|---|---|
| Large supermarket | 2,200 m | – |
| GP practice | 2,100 m | – |
| Primary school | 2,300 m | – |
| Daycare | 1,400 m | – |
| Large supermarkets | – | 0 |
| GP practices | – | 0 |
| Daycares | – | 0.3 |
Average road distance from every address in this buurt to the nearest amenity, and the average count within 1 km — a buurt average, not a distance from one address.
Source: CBS proximity statistics 2025
Kromme Aar has 30 inhabitants (2026), or 21 per km² (98% lower than in Alphen aan den Rijn). In the 2025 House of Representatives (Tweede Kamer) election, turnout in the municipality of Alphen aan den Rijn was 81%, 3 percentage points above the national 78%. Of the parties that are largest nationally, D66 had the highest share there: 17% of the vote, against 17% nationally. Election results exist only per municipality, so these are the municipality's figures.
The population grew 50% between 2021 and 2026, to 30.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
With 21 residents per km², this buurt is 98% less densely populated than the municipality of Alphen aan den Rijn.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
In 2025, almost no children were born; almost no one died.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
80% of residents are between 45 and 65.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
50% of residents are never married.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
83% of residents have Dutch origin.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
These figures are for the whole municipality of Alphen aan den Rijn; there is no result per buurt or wijk. At the general election (Tweede Kamer) of 29 October 2025, 81% of eligible voters in Alphen aan den Rijn voted. The largest party was D66 with 17% of the valid votes.
Official election result (Kiesraad), top 8 parties by national vote count plus 'Other'; share of valid votes. A voter may vote at any polling station in their own gemeente; there is therefore no reliable buurt- or wijk-level result. This figure is the whole gemeente's own result.
Source: Kiesraad — Verkiezingsuitslag Tweede Kamer (data.overheid.nl) TK2025
50% of cars run on something other than petrol (diesel, LPG or electricity, hybrids included), 28 percentage points more than in Alphen aan den Rijn (22%).
50% of passenger cars do not run on petrol (diesel, LPG, electric etc.), against 22% in the municipality of Alphen aan den Rijn (2025).
CBS splits passenger cars into 'petrol' and 'other fuel' only. That second category bundles diesel, LPG, electric (including hybrid), hydrogen, alcohol, LNG and CNG together — CBS publishes no separate electric-car count per buurt, wijk or gemeente, so this is not the same as an 'electric share'.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
The share of passenger cars not running on petrol went from 0% to 50% between 2021 and 2025.
See the 'Passenger cars by fuel type' card for what 'other fuel' covers — this is not the share of electric cars.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
In 2025, 30 passenger cars and 0 motorcycles were registered here.
At this level CBS publishes only passenger cars and motorcycles, no vans or trucks.
Source: CBS Kerncijfers wijken en buurten (KWB) 2025
46% of addresses are residential; the largest other use is assembly (19%).
Based on 26 verblijfsobjecten in use. An object with several registered uses (e.g. a flat above a shop) is counted under each of them, so the shares can add up to more than 100%.
Source: Kadaster BAG (bag-light.gpkg) 2026-09-01
21 residents per km²: 96% less densely populated than the Dutch average.
The 5 characteristics that differ most from the national average, ranked by log ratio (so a halving and a doubling count as equally different); the shown percentage is the ordinary difference against the Netherlands.
Source: CBS Kerncijfers wijken en buurten (KWB) 2026
| Weidebloemenbuurt-Zuid | 1,905 | €394,000 | 16 |
| Weidebloemenbuurt-Noord | 860 | €371,000 | 14 |
| Steinenbuurt | 1,250 | €355,000 | 19 |
| Paddestoelenbuurt | 2,250 | €351,000 | 16 |
| Ericapark | 1,115 | €312,000 | 32 |
| Edelstenenbuurt | 2,740 | €296,000 | 25 |