Postcode area · Collex-Bossy · Geneva
1239 Collex (Collex-Bossy): key figures
1239 Collex (postcode area in Collex-Bossy) has 1,570 residents in 2025 across 6.5 km², or 243 people per km². Population: −0.9% between 2015 and 2025.
- 1,570 residents
- 6.5 km²
- 243 people/km²
1239 Collex in numbers
Population
1,570
ranked 1,232 of 2,275
−0.9%between 2015 and 2025
2015–2025
Population density
243people/km²
ranked 1,246 of 2,275
Area
6.5km²
ranked 1,801 of 3,168
Share of foreign nationals
33.2%
ranked 313 of 2,040
Dwellings
660
ranked 1,567 of 3,164
Residential buildings
374
ranked 1,532 of 3,160
Dwellings in buildings built before 1946
23.2%
ranked 1,913 of 3,164
Key points
Nationally, 1239 Collex ranks No. 1,232 of 2,275 postcode areas.
Population of 1239 Collex over time
Population, 2015–2025
1239 Collex had 1,585 residents in 2015 and 1,570 in 2025.
| Year | Population |
|---|---|
| 2015 | 1,585 |
| 2020 | 1,575 |
| 2023 | 1,570 |
| 2025 | 1,570 |
All indicators for 1239 Collex
Next to the value for 1239 Collex: all postcode areas of Collex-Bossy, then of the whole country (totals for counts, weighted averages for rates).
1239 CollexNational medianHover over or tap a bar to see what it shows.
Housing
| Indicator | 1239 Collex | Collex-Bossy | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Dwellings (2026) | 660 | – | – | ranked 1,567 of 3,164 | ||
| Residential buildings (2026) | 374 | – | – | ranked 1,532 of 3,160 | ||
| Dwellings in buildings built before 1946 (2026) | 23.2% | 23.2% | 23.2% | ranked 1,913 of 3,164 | ||
| Dwellings in buildings built since 2001 (2026) | 25.2% | 25.2% | 23.6% | ranked 1,228 of 3,164 | ||
| Share of detached houses among residential buildings (2026) | 73.8% | 73.8% | 63.5% | ranked 1,161 of 3,160 |
Energy
| Indicator | 1239 Collex | Collex-Bossy | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 72.2% | 72.2% | 56.2% | ranked 428 of 3,160 | ||
| Heat pumps as main heating (2026) | 9.3% | 9.3% | 16.2% | ranked 2,055 of 3,160 | ||
| Wood heating systems (2026) | 7.5% | 7.5% | 13.5% | ranked 2,326 of 3,160 | ||
| District heating (2026) | 0.3% | 0.3% | 5.6% | ranked 2,015 of 3,160 |
Society
| Indicator | 1239 Collex | Collex-Bossy | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 33.2% | 33.2% | 29.8% | ranked 313 of 2,040 |
Where is 1239 Collex?
Frequently asked questions
What is the population of 1239 Collex (Collex-Bossy)?
1239 Collex has 1,570 residents in 2025. It covers 6.5 km², or 243 people per km².
Where is 1239 Collex?
1239 Collex (postcode area) is part of Collex-Bossy, in Geneva.
What is the value of “Share of foreign nationals” in 1239 Collex?
Share of foreign nationals: 33.2% (2025), ranked 313 of 2,040 postcode areas in the country.
What is the value of “Dwellings” in 1239 Collex?
Dwellings: 660 (2026), ranked 1,567 of 3,164 postcode areas in the country.