Postcode area · Herisau · Appenzell Ausserrhoden

9100 Herisau (Herisau): key figures

9100 Herisau (postcode area in Herisau) has 15,886 residents in 2025 across 22.0 km², or 721 people per km². Population: +2.6% between 2015 and 2025.

  • 15,886 residents
  • 22.0 km²
  • 721 people/km²

9100 Herisau in numbers

Population
15,886
ranked 114 of 2,275
+2.6%between 2015 and 2025
2015–2025
Population density
721people/km²
ranked 510 of 2,275
Area
22.0km²
ranked 427 of 3,168
Share of foreign nationals
27.5%
ranked 597 of 2,040
Dwellings
8,700
ranked 105 of 3,164
Residential buildings
2,906
ranked 26 of 3,160
Dwellings in buildings built before 1946
35.4%
ranked 1,136 of 3,164

Key points

Nationally, 9100 Herisau ranks No. 114 of 2,275 postcode areas.

Population of 9100 Herisau over time

15,20015,40015,60015,80016,0002015202020232025
Population, 2015–2025

9100 Herisau had 15,490 residents in 2015 and 15,886 in 2025.

YearPopulation
201515,490
202015,391
202315,667
202515,886

All indicators for 9100 Herisau

Next to the value for 9100 Herisau: all postcode areas of Herisau, then of the whole country (totals for counts, weighted averages for rates).

9100 HerisauNational medianHover over or tap a bar to see what it shows.

Housing

Indicator9100 HerisauHerisauSwitzerlandPosition?Rank in the areaRank in the country
Dwellings (2026)8,700––ranked 1 of 2ranked 105 of 3,164
Residential buildings (2026)2,906––ranked 1 of 2ranked 26 of 3,160
Dwellings in buildings built before 1946 (2026)35.4%35.7%23.2%ranked 2 of 2ranked 1,136 of 3,164
Dwellings in buildings built since 2001 (2026)15.0%14.8%23.6%ranked 1 of 2ranked 2,194 of 3,164
Share of detached houses among residential buildings (2026)57.3%58.0%63.5%ranked 2 of 2ranked 2,532 of 3,160

Energy

Indicator9100 HerisauHerisauSwitzerlandPosition?Rank in the areaRank in the country
Oil or gas heating systems (2026)72.0%70.6%56.2%ranked 1 of 2ranked 440 of 3,160
Heat pumps as main heating (2026)10.1%10.1%16.2%ranked 1 of 2ranked 1,939 of 3,160
Wood heating systems (2026)13.9%15.4%13.5%ranked 2 of 2ranked 1,744 of 3,160
District heating (2026)0.6%0.6%5.6%ranked 1 of 2ranked 1,742 of 3,160

Society

Indicator9100 HerisauHerisauSwitzerlandPosition?Rank in the areaRank in the country
Share of foreign nationals (2025)27.5%27.5%29.8%ranked 597 of 2,040

Where is 9100 Herisau?

Other postcode areas in Herisau

Postcode areas near 9100 Herisau

Next in alphabetical order: 9112 Schachen b. Herisau

The postcode areas of Herisau

Back to the page for Herisau

Frequently asked questions

What is the population of 9100 Herisau (Herisau)?

9100 Herisau has 15,886 residents in 2025. It covers 22.0 km², or 721 people per km².

Where is 9100 Herisau?

9100 Herisau (postcode area) is part of Herisau, in Appenzell Ausserrhoden.

What is the value of “Share of foreign nationals” in 9100 Herisau?

Share of foreign nationals: 27.5% (2025), ranked 597 of 2,040 postcode areas in the country.

What is the value of “Dwellings” in 9100 Herisau?

Dwellings: 8,700 (2026), ranked 105 of 3,164 postcode areas in the country.