Postcode area · Cologny · Geneva
1223 Cologny (Cologny): key figures
1223 Cologny (postcode area in Cologny) has 6,117 residents in 2025 across 7.4 km², or 823 people per km². Population: +13.6% between 2015 and 2025.
- 6,117 residents
- 7.4 km²
- 823 people/km²
1223 Cologny in numbers
Population
6,117
ranked 359 of 2,275
+13.6%between 2015 and 2025
2015–2025
Population density
823people/km²
ranked 451 of 2,275
Area
7.4km²
ranked 1,569 of 3,168
Share of foreign nationals
38.8%
ranked 157 of 2,040
Dwellings
2,803
ranked 413 of 3,164
Residential buildings
1,064
ranked 405 of 3,160
Dwellings in buildings built before 1946
11.0%
ranked 2,819 of 3,164
Key points
Nationally, 1223 Cologny ranks No. 359 of 2,275 postcode areas.
Population of 1223 Cologny over time
Population, 2015–2025
1223 Cologny had 5,385 residents in 2015 and 6,117 in 2025.
| Year | Population |
|---|---|
| 2015 | 5,385 |
| 2020 | 5,718 |
| 2023 | 5,953 |
| 2025 | 6,117 |
All indicators for 1223 Cologny
Next to the value for 1223 Cologny: all postcode areas of Cologny, then of the whole country (totals for counts, weighted averages for rates).
1223 ColognyNational medianHover over or tap a bar to see what it shows.
Housing
| Indicator | 1223 Cologny | Cologny | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Dwellings (2026) | 2,803 | – | – | ranked 413 of 3,164 | ||
| Residential buildings (2026) | 1,064 | – | – | ranked 405 of 3,160 | ||
| Dwellings in buildings built before 1946 (2026) | 11.0% | 11.0% | 23.2% | ranked 2,819 of 3,164 | ||
| Dwellings in buildings built since 2001 (2026) | 32.5% | 32.5% | 23.6% | ranked 616 of 3,164 | ||
| Share of detached houses among residential buildings (2026) | 78.2% | 78.2% | 63.5% | ranked 701 of 3,160 |
Energy
| Indicator | 1223 Cologny | Cologny | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 85.4% | 85.4% | 56.2% | ranked 66 of 3,160 | ||
| Heat pumps as main heating (2026) | 7.1% | 7.1% | 16.2% | ranked 2,393 of 3,160 | ||
| Wood heating systems (2026) | 0.8% | 0.8% | 13.5% | ranked 3,092 of 3,160 | ||
| District heating (2026) | 1.1% | 1.1% | 5.6% | ranked 1,420 of 3,160 |
Society
| Indicator | 1223 Cologny | Cologny | Switzerland | Position? | Rank in the area | Rank in the country |
|---|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 38.8% | 38.8% | 29.8% | ranked 157 of 2,040 |
Where is 1223 Cologny?
Frequently asked questions
What is the population of 1223 Cologny (Cologny)?
1223 Cologny has 6,117 residents in 2025. It covers 7.4 km², or 823 people per km².
Where is 1223 Cologny?
1223 Cologny (postcode area) is part of Cologny, in Geneva.
What is the value of “Share of foreign nationals” in 1223 Cologny?
Share of foreign nationals: 38.8% (2025), ranked 157 of 2,040 postcode areas in the country.
What is the value of “Dwellings” in 1223 Cologny?
Dwellings: 2,803 (2026), ranked 413 of 3,164 postcode areas in the country.