Postcode area · Herznach-Ueken · Aargau

5027 Herznach (Herznach-Ueken): key figures

5027 Herznach (postcode area in Herznach-Ueken) has 1,774 residents in 2025 across 6.3 km², or 283 people per km². By population, 5027 Herznach ranks No. 1 of 2 postcode areas in Herznach-Ueken. Population: +25.5% between 2015 and 2025.

  • 1,774 residents
  • 6.3 km²
  • 283 people/km²

5027 Herznach in numbers

Population
1,774
ranked 1,122 of 2,275
+25.5%between 2015 and 2025
2015–2025
Population density
283people/km²
ranked 1,134 of 2,275
Area
6.3km²
ranked 1,847 of 3,168
Share of foreign nationals
20.9%
ranked 1,022 of 2,040
Dwellings
809
ranked 1,353 of 3,164
Residential buildings
471
ranked 1,220 of 3,160
Dwellings in buildings built before 1946
20.0%
ranked 2,145 of 3,164

Key points

By population, 5027 Herznach ranks No. 1 of 2 postcode areas in Herznach-Ueken.

Nationally, 5027 Herznach ranks No. 1,122 of 2,275 postcode areas.

Population of 5027 Herznach over time

1,4001,5001,6001,7001,8002015202020232025
Population, 2015–2025

5027 Herznach had 1,413 residents in 2015 and 1,774 in 2025.

YearPopulation
20151,413
20201,555
20231,636
20251,774

All indicators for 5027 Herznach

Next to the value for 5027 Herznach: all postcode areas of Herznach-Ueken, then of the whole country (totals for counts, weighted averages for rates).

5027 HerznachNational medianHover over or tap a bar to see what it shows.

Housing

Indicator5027 HerznachHerznach-UekenSwitzerlandPosition?Rank in the areaRank in the country
Dwellings (2026)809––ranked 1 of 2ranked 1,353 of 3,164
Residential buildings (2026)471––ranked 1 of 2ranked 1,220 of 3,160
Dwellings in buildings built before 1946 (2026)20.0%19.2%23.2%ranked 1 of 2ranked 2,145 of 3,164
Dwellings in buildings built since 2001 (2026)42.2%38.8%23.6%ranked 1 of 2ranked 149 of 3,164
Share of detached houses among residential buildings (2026)76.9%79.2%63.5%ranked 2 of 2ranked 840 of 3,160

Energy

Indicator5027 HerznachHerznach-UekenSwitzerlandPosition?Rank in the areaRank in the country
Oil or gas heating systems (2026)42.0%46.8%56.2%ranked 2 of 2ranked 1,980 of 3,160
Heat pumps as main heating (2026)18.8%16.9%16.2%ranked 1 of 2ranked 980 of 3,160
Wood heating systems (2026)21.2%21.5%13.5%ranked 2 of 2ranked 1,215 of 3,160
District heating (2026)0.3%0.2%5.6%ranked 1 of 2ranked 2,015 of 3,160

Society

Indicator5027 HerznachHerznach-UekenSwitzerlandPosition?Rank in the areaRank in the country
Share of foreign nationals (2025)20.9%21.7%29.8%ranked 2 of 2ranked 1,022 of 2,040

Where is 5027 Herznach?

Other postcode areas in Herznach-Ueken

Postcode areas near 5027 Herznach

Next in alphabetical order: 5028 Ueken

The postcode areas of Herznach-Ueken

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Frequently asked questions

What is the population of 5027 Herznach (Herznach-Ueken)?

5027 Herznach has 1,774 residents in 2025. It covers 6.3 km², or 283 people per km².

Where is 5027 Herznach?

5027 Herznach (postcode area) is part of Herznach-Ueken, in Aargau.

What is the value of “Share of foreign nationals” in 5027 Herznach?

Share of foreign nationals: 20.9% (2025), ranked 1,022 of 2,040 postcode areas in the country.

What is the value of “Dwellings” in 5027 Herznach?

Dwellings: 809 (2026), ranked 1,353 of 3,164 postcode areas in the country.