Photo: Zmbmee · CC BY-SA 3.0Boissy-sous-Saint-Yon stands out for theft of vehicle parts: 8.8 times the rate of a typical town its size
The rate the grade counts dropped 14% from 2023 to 2025. It places 821st of the 1,554 compared French towns nearest in size, the least crime first. Overall, it grades B+ for safety (#18 of 91 in Essonne). Annual rates stand at 4.8 violent crimes and 13.2 incidents of burglary, vehicle theft and damage for every thousand residents.
Offenses recorded per 1,000 residents a year, 2023–2025 average (INSEE population of each year). Violence, and burglaries, vehicle thefts, thefts from vehicles and criminal damage, count equally.
What stands out about safety in Boissy-sous-Saint-Yon
Criminal damage fell sharply
Police and gendarmerie recorded 32 cases of criminal damage in Boissy-sous-Saint-Yon in 2023 and 21 in 2025. Small counts swing from year to year; the grade averages the three years. Year by year ↓
Less violence than burglary, vehicle theft and damage
Boissy-sous-Saint-Yon recorded an average of 4.8 violent incidents per 1,000 residents a year, 2023–2025, fewer than in 75% of compared French towns, and 13.2 burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage, fewer than in 55%. Safety Grade ↓
Among towns its size
Among the 1,554 French towns of 2,700 to 5,200 people with a Safety Grade, Boissy-sous-Saint-Yon is 821st from the lowest recorded rate per resident. Towns its size ↓
Written from the SSMSI and INSEE data on this page. Figures are offenses police and gendarmerie recorded, not convictions.
What sits behind Boissy-sous-Saint-Yon’s B+
A fairly firm grade. Built on 194 offenses recorded in the graded categories over three years; with a town of 3,882, a few cases more or fewer would move it between B− and A−.
Hidden counts: for other physical violence and sexual violence, this figure isn’t published when it’s small (five or fewer in at least one of the last three years); the index uses the département’s average instead, 7.3% of the index here. What isn’t published ↓
Per resident, against the 4,295 compared French towns with a Safety Grade.
What police and gendarmerie recorded most in 2025
Well above the median of towns its size: theft of vehicle parts (3.9 per 1,000 against 0.4). None recorded in 2025: armed robbery and robbery without a weapon. Not published for 2025: other physical violence, sexual violence, drug use and drug dealing.
Theft without violence, robbery without a weapon, theft of vehicle parts, fraud and drug offenses are shown for information but left out of the Safety Grade, which counts violence plus burglaries, vehicle thefts, thefts from vehicles and criminal damage per resident.
Per 1,000 residents in 2025; the tick is the median of the graded French towns of 2,500 to 10,000.
Boissy-sous-Saint-Yon, year by year
Violence · per 1,000 residents
Burglary, vehicle theft, damage · per 1,000 residents
| Kind | In the grade | 2023 | 2024 | 2025 |
|---|---|---|---|---|
| Family violence | Violence | 16 | 11 | 13 |
| Other physical violence | Violence | n.p. | n.p. | n.p. |
| Sexual violence | Violence | n.p. | n.p. | n.p. |
| Armed robbery | Violence | 0 | 0 | 0 |
| Burglary | Burglary, vehicle theft, damage | 8 | 9 | 16 |
| Vehicle theft | Burglary, vehicle theft, damage | 6 | 8 | 9 |
| Theft from vehicles | Burglary, vehicle theft, damage | 13 | 8 | 5 |
| Criminal damage | Burglary, vehicle theft, damage | 32 | 19 | 21 |
| Theft without violence | Not in the grade | 15 | 17 | 11 |
| Robbery without a weapon | Not in the grade | 0 | 0 | 0 |
| Theft of vehicle parts | Not in the grade | n.p. | n.p. | 15 |
| Fraud | Not in the grade | 21 | 19 | 17 |
| Drug use | Not in the grade | n.p. | n.p. | n.p. |
| Drug dealing | Not in the grade | n.p. | n.p. | n.p. |
Counts mix units, as SSMSI publishes them: victims for violence, offenses for burglary and damage, vehicles for vehicle theft. That’s why the page never adds them into one “total crimes”.
Offenses recorded each year. n.p.: not published (small: five or fewer in at least one of the last three years).
Crime in Boissy-sous-Saint-Yon per 1,000 residents
Each dot is one resident’s share: offenses are counted, not victims, and one person can be the victim of several.
And 13 burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage, and 9 thefts without violence and frauds: a year, 2023–2025 average.
Set against 1,554 towns its size, Boissy-sous-Saint-Yon is 821st
| # | Town | People | Violence | Homes, vehicles | Safety |
|---|---|---|---|---|---|
| 1 | Neuilly-Crimolois Côte-d'Or | 3,588 | 2.2 | 4.8 | A+ |
| … | |||||
| 450 | Nozay Essonne | 4,471 | 3.9 | 10.5 | A− |
| … | |||||
| 507 | Cerny Essonne | 3,531 | 3.9 | 11.1 | A− |
| … | |||||
| 516 | Morigny-Champigny Essonne | 4,412 | 4 | 11 | A− |
| … | |||||
| 606 | Bruyères-le-Châtel Essonne | 3,788 | 7.9 | 8 | A− |
| … | |||||
| 818 | Lorris Loiret | 2,996 | 7 | 10.9 | B+ |
| 819 | Rocheservière Vendée | 3,594 | 2.1 | 15.9 | B+ |
| 820 | Mesnil-en-Ouche Eure | 4,414 | 8.8 | 9.2 | B+ |
| 821 | Boissy-sous-Saint-Yon Essonne | 3,882 | 4.8 | 13.2 | B+ |
| 822 | Renage Isère | 3,348 | 5.1 | 12.9 | B+ |
| 823 | Neuvic Dordogne | 3,687 | 10 | 8 | B+ |
| 824 | Bourg-Argental Loire | 2,886 | 7.8 | 10.1 | B+ |
| … | |||||
| 1554 | Colombier-Saugnieu Rhône | 2,874 | 35.4 | 56.6 | D− |
Per 1,000 residents a year. Context only: the grade compares Boissy-sous-Saint-Yon with every compared French town, not just towns its size.
Lowest rate in the graded categories first, 2023–2025 average, with the closest to Boissy-sous-Saint-Yon and up to four from Essonne.
Boissy-sous-Saint-Yon and the towns around it
| Town | People | Violence | Homes, vehicles | Safety |
|---|---|---|---|---|
| Boissy-sous-Saint-Yon | 3,882 | 4.8 | 13.2 | B+ |
| Égly | 7,166 | 7.6 | 11.5 | B |
| Breuillet | 9,157 | 6.7 | 10.5 | B+ |
| Arpajon | 11,698 | 10.6 | 20.8 | C− |
| Bruyères-le-Châtel | 3,788 | 7.9 | 8 | A− |
| Ollainville | 5,455 | 5.2 | 16.1 | B− |
| La Norville | 4,268 | 7.7 | 17.4 | C |
2 of its 6 graded neighbors have a lower recorded rate in the graded categories than Boissy-sous-Saint-Yon.
The nearest towns of 2,500 or more, per 1,000 residents a year, 2023–2025 average.
What this data can and can’t tell you
- Where offenses happen, not where victims live. SSMSI counts each offense in the commune where police or gendarmerie recorded it happening. Towns with shops, stations, a hospital or nightlife record more per resident, and visitors are part of that count but not of the population it is divided by.
- An index, not a total. The kinds are counted in different units (victims, offenses, vehicles), so the grade adds their rates per 1,000 residents into an index and never shows a “total crimes” or a chance of being a victim.
- Hidden counts. SSMSI doesn’t publish a commune’s count when it’s small (five or fewer in at least one of the last three years). In its place it gives the average among the département’s communes whose count is hidden; the grade uses that average, never zero, and a town gets no Safety Grade when over a quarter of its index would come from such averages.
- Recorded, not all crime. Only offenses reported to or found by police and gendarmerie are counted. Reporting rates differ by kind: most vehicle thefts are reported, much family and sexual violence isn’t.
Questions about safety in Boissy-sous-Saint-Yon
Is Boissy-sous-Saint-Yon safe?
It has less crime per resident than 67% of compared French towns: an average of 4.8 recorded violent incidents and 13.2 recorded burglaries, vehicle thefts, thefts from vehicles and acts of criminal damage per 1,000 residents a year, 2023–2025. It grades B+ for safety, #18 of 91 in Essonne. Among the 1,554 French towns of 2,700 to 5,200 people, it is 821st from the lowest rate.
Is crime going up in Boissy-sous-Saint-Yon?
The recorded rate in the graded categories fell 14% from 2023 to 2025: 20.7 per 1,000 residents in 2023, 17.8 in 2025. In a town this size a few dozen cases move the figure, so the grade uses the three-year average.
What is the most common recorded offense in Boissy-sous-Saint-Yon?
Criminal damage: 21 in 2025. Then fraud (17), burglary (16) and theft of vehicle parts (15).
Sources: SSMSI (Interior Ministry), recorded crime by commune, 2023–2025 (base communale de la délinquance enregistrée, 2026 edition) · INSEE, legal populations for each year · INSEE, census 2023 (jobs and working residents) · IGN Admin Express (boundaries) · TownRatings grades: our own summary of the data, ranking French towns against each other only, updated November 4, 2026. Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.