Saint-Quentin
Saint-Quentin is a city in France. Annual NO₂ was 10.7 µg/m³ in 2024. Saint-Quentin had a population of 52,813 at the start of 2024. In 2024, annual PM2.5 was 9.63 µg/m³. The city covered 22.6 km² in 2022. Population density was 2,349.1 people per km² in 2022. Annual PM10 was 14 µg/m³ in 2024. The unemployment rate was 21.9% at the end of 2022.
Higher unemployment than 97% of French cities that publish it and dirtier air than 84% of French cities that publish it.
Who Saint-Quentin may suit
Relative profile scores use comparable published values. They are a decision aid, not a personal recommendation.
Population and city profile
Derived from the published population and foreign-resident counts.
| Metric | Value | Verified | Source |
|---|---|---|---|
| City area | 22.56 km2 | 2026-07-142022 | Official sourceA-ccepted source for city area and derived population density Source-backed value · place |
| Foreign residents | 3,392 people | 2026-07-152021 | Official sourceNationalité en 2021 — Base des tableaux détaillés — NAT1 Source-backed value |
| Population density | 2,349.0691 people/km² | 2026-07-142022 | Official sourceA-ccepted source for city area and derived population density Source-backed value · place |
| Population | 52,813 people | 2026-07-14Aging | Official sourceFrance official denominator source Source-backed value |
Work and income
Published unemployment rates for cities in the same country.
| Metric | Value | Verified | Source |
|---|---|---|---|
| Gigabit broadband availability | 97.18 % | 2026-07-15Fresh | Official sourceIndependent ARCEP municipal count of premises eligible for the >=1 Gbit/s fixed advertised-speed class, divided by the ARCEP type=all municipal premises denominator. This is availability/eligibility, not adoption, measured speed, FTTH-only coverage or mobile coverage. Source-backed value |
| Unemployment rate | 21.8566 %country median 10.5% — 107% above | 2026-07-262022 | Official sourceINSEE RP2022 ACT1 — population active by type of activity, commune Source-backed value |
Climate and air quality
Published monthly climate normals for this city.
Published monthly climate normals for this city.
Published monthly climate normals for this city.
City values from the published air-quality observations. WHO 2021 guidelines and EU limit values are published constants.
Published annual means from the same national measurement network.
| Metric | Value | Verified | Source |
|---|---|---|---|
| NO₂ — annual mean | 10.7302 µg/m³country median 14.8 — 28% below | 2026-07-152024 | Official source2024 validated hourly NO2 station observations transformed to the exact INSEE commune centre by deterministic nearest-station selection and equal-weight aggregation. Source-backed value |
| NO₂ — latest reading | 10.9 µg/m³ | 2026-07-15Fresh | Official sourceLatest valid NO2 hourly station observation on the official LCSQA E2 current-day extract, mapped to the exact INSEE centre through an exact normalized station-name crosswalk to EEA station metadata. Source-backed value |
| PM10 — annual mean | 13.9737 µg/m³country median 14.3 — 2% below | 2026-07-152024 | Official source2024 validated hourly NO2 station observations transformed to the exact INSEE commune centre by deterministic nearest-station selection and equal-weight aggregation. Source-backed value |
| PM2.5 — annual mean | 9.6255 µg/m³country median 8.5 — 13% above | 2026-07-152024 | Official source2024 validated hourly NO2 station observations transformed to the exact INSEE commune centre by deterministic nearest-station selection and equal-weight aggregation. Source-backed value |
| Average daytime high by month | Jan 6 · Feb 7.1 · Mar 11.2 · Apr 15 · May 18.4 · Jun 21.5 · Jul 24 · Aug 23.9 · Sep 20.2 · Oct 15.2 · Nov 9.8 · Dec 6.5 °C | 2026-07-311991 | Official sourceWMO Climatological Normals 1991-2020 — station ST_QUENTIN Source-backed value · nearest-station reading |
| Average night-time low by month | Jan 1.1 · Feb 1.2 · Mar 3.1 · Apr 4.9 · May 8.3 · Jun 11 · Jul 12.9 · Aug 12.9 · Sep 10.3 · Oct 7.6 · Nov 4.1 · Dec 1.7 °C | 2026-07-311991 | Official sourceWMO Climatological Normals 1991-2020 — station ST_QUENTIN Source-backed value · nearest-station reading |
| Average temperature by month | Jan 3.6 · Feb 4.2 · Mar 7.2 · Apr 10 · May 13.4 · Jun 16.2 · Jul 18.4 · Aug 18.4 · Sep 15.2 · Oct 11.4 · Nov 6.9 · Dec 4.1 °C | 2026-07-311991 | Official sourceWMO Climatological Normals 1991-2020 — station ST_QUENTIN Source-backed value · nearest-station reading |
| Average precipitation by month | Jan 54.1 · Feb 48 · Mar 51.3 · Apr 43.2 · May 57.1 · Jun 59.8 · Jul 60.2 · Aug 70.8 · Sep 51.4 · Oct 60.3 · Nov 56.8 · Dec 70.4 mm | 2026-07-311991 | Official sourceWMO Climatological Normals 1991-2020 — station ST_QUENTIN Source-backed value · nearest-station reading |
| Average sunshine by month | Jan 61 · Feb 79 · Mar 134 · Apr 182 · May 205 · Jun 207 · Jul 213 · Aug 206 · Sep 167 · Oct 115 · Nov 66 · Dec 54 hours | 2026-07-311991 | Official sourceWMO Climatological Normals 1991-2020 — station ST_QUENTIN Source-backed value · nearest-station reading |
Annual PM2.5 fell 35.8% between 2014 and 2024, from 15.0 to 9.6.
Each point keeps the source and period it was published with.
Worked out from these numbers
Arithmetic on the published values above. Each one names what it assumed.
How international is the population?
6.4% of residents hold a foreign nationality — 3,392 people of 52,813 people. This counts nationality, not place of birth, so long-settled residents who naturalised are not in it.
Common questions
Answered from the published values on this page, each with its source and date.
What is the unemployment rate in Saint-Quentin?
The unemployment rate is 21.8566 %. Source: INSEE RP2022 ACT1 — population active by type of activity, commune, checked 2026-07-26.
Is the air quality good in Saint-Quentin?
The annual PM2.5 mean is 9.6255 µg/m³. The WHO 2021 guideline is 5 µg/m³ and the EU limit value is 25 µg/m³, so this reading is above the WHO guideline but within the EU limit. Source: 2024 validated hourly NO2 station observations transformed to the exact INSEE commune centre by deterministic nearest-station selection and equal-weight aggregation., checked 2026-07-15.
How many people live in Saint-Quentin?
The published population is 52,813 people. Source: France official denominator source, checked 2026-07-14.
How many foreign residents live in Saint-Quentin?
3,392 people residents hold a foreign nationality. Source: Nationalité en 2021 — Base des tableaux détaillés — NAT1, checked 2026-07-15.
Cities of a similar size in France
Closest published populations, for a like-for-like comparison.
Sources
Spotted a number that looks wrong? Every value here carries its source and date — tell us what you found and we will re-check it against the source.