Coat of arms of Aargau canton, Switzerland

Aargau

(Aargau · Argòvia · Argov)

Canton · Administrative region

Capital: Aarau

653 337
Population
1 404 km²
Area
11
Districts
Official language: German

Cities & Towns

Top 458 places

Aargau covers 1 404 km² , divided into 11 districts, with Aarau as its capital city. Around 653 337 people live here, giving a population density of 465 per km² Click a district on the map to open its page.

Maps & Downloads

SVG and PNG, 600 px
Aargau canton map with district boundaries, Switzerland

Aargau canton map with district boundaries, Switzerland

Canton boundary with all district borders

Switzerland map with Aargau canton highlighted

Switzerland map with Aargau canton highlighted

All 26 cantons, this one highlighted

Aargau canton outline map, Switzerland

Aargau canton outline map, Switzerland

Clean solid-fill outline shape

Districts

11 districts

Aargau is split into 11 districts. The largest is Bezirk Laufenburg at 172 km², and the smallest is Bezirk Kulm at 101 km² Bezirk Baden has the highest building count in OSM, with 47 898 recorded structures.

District Population Area (km²) Buildings Postcodes
Bezirk Laufenburg 35 182 172 24 539 29 Open
Bezirk Baden 144 029 153 47 898 39 Open
Bezirk Zofingen 73 327 142 31 385 24 Open
Bezirk Muri 32 136 139 18 737 23 Open
Bezirk Brugg 51 544 130 26 169 27 Open
Bezirk Zurzach 34 375 130 20 583 27 Open
Bezirk Bremgarten 61 163 118 32 247 28 Open
Bezirk Rheinfelden 47 676 112 20 588 15 Open
Bezirk Aarau 80 885 104 29 455 19 Open
Bezirk Lenzburg 56 926 103 27 052 25 Open
Bezirk Kulm 36 094 101 23 972 19 Open

Postcodes

236 postcode areas

Aargau has 236 postcode areas, covering roughly 4 031 km² and 528 768 mapped buildings. Postcodes in Aargau start with 5 / 4 / 8 / 6 (covering 5xxx, 4xxx, 8xxx, 6xxx), placing the canton in these Swiss postal zones. The most built-up postcode is 4600, with around 4 465 buildings. The map shades each postcode area by code number, so you can see at a glance how the Aargau postal zones are laid out geographically.

236
Total postcodes
528 768
Buildings
4 031 km²
Total area
874
Avg. buildings
6.7 km²
Avg. area
1 318
Cities covered
4
Prefix zones
Colour by

Map legend

Jump to postcode

Postcodes by building count

# Code Name Buildings Population Area km²
1 n/a 4 465 10 550 11.49
2 n/a 3 633 21 877 10.59
3 n/a 3 534 9 153 12.34
4 n/a 3 303 10 853 12.85
5 n/a 3 075 12 776 12.49
6 n/a 2 799 20 047 8.25
7 n/a 2 721 13 251 18.79
8 n/a 2 648 13 870 11.08
9 n/a 2 398 11 490 11.85
10 n/a 2 314 7 856 6.3
11 n/a 2 300 10 940 17.23
12 n/a 2 224 1 914 16.02
13 n/a 2 219 6 502 7.32
14 n/a 2 195 8 863 9.47
15 n/a 2 060 11 545 10.62
16 n/a 2 007 7 164 8.89
17 n/a 1 891 5 065 7.84
18 n/a 1 782 4 789 7.16
19 n/a 1 717 4 810 4.41
20 n/a 1 641 8 561 7.02

Postal services in Aargau

Aargau has 1992 mapped postal facilities: 309 post offices, 1643 post boxes, 40 parcel lockers. Swiss Post runs a wide network of branches and automated MyPost 24 parcel lockers across the canton.

4656 Starrkirch-Wil · 4656 Starrkirch-Wil
5212 Hausen AG
5300 Turgi
5405 Baden-Dättwil · 5405 Dättwil
5507 Mellingen
5512 Wohlenschwil · 5512 Wohlenschwil
5610 Post Wohlen 1 · 5610 Wohlen (AG)
5620 Bremgarten
8917 Oberlunkhofen · 8917 Oberlunkhofen
Baden 1 · 5400 Baden
Baden 6 Rütihof
Birmenstorf

Transport

60 lines, 253 routes

Click a route on the map to see its details.

By mode

bus 60 lines

Network overview

Lines 60
Routes 253
Total network length 2360.2 km
Operators 7
Longest line 245: 163.7 km
Most stops 1: 67 stops

Aargau has 2360.2 km of public transport routes across 60 lines and 253 services, run by 7 operators.

Full transport breakdown

Population and Building Density

by municipality (Gemeinde borders)

Summary

Hover over a municipality to see its figures.

Public Holidays

28 holidays in 2026 & 2027

Aargau observes 14 public holidays in 2026. Alongside the Swiss national holidays, Aargau has 10 canton-specific holidays.

Date Holiday Day Scope
01.01.2026 New Year's Day Thursday National
02.01.2026 Saint Berchtold's Day Friday Canton
03.04.2026 Good Friday Friday Canton
06.04.2026 Easter Monday Monday Canton
01.05.2026 Labor Day Friday Canton
14.05.2026 Ascension Day Thursday National
25.05.2026 Whit Monday Monday Canton
04.06.2026 Corpus Christi Thursday Canton
01.08.2026 National Day Saturday National
15.08.2026 Assumption Day Saturday Canton
01.11.2026 All Saints' Day Sunday Canton
08.12.2026 Immaculate Conception Tuesday Canton
25.12.2026 Christmas Day Friday National
26.12.2026 Saint Stephen's Day Saturday Canton

Heraldry

Official heraldry, free to download

These are the official heraldic symbols of Aargau. The images come from Wikimedia Commons and can be downloaded below in SVG (scales to any size) or PNG (600 x 600 px).

Questions about Aargau

Quick answers
What is the capital city of Aargau?

The capital of Aargau is Aarau, with around 21 191 residents.

How many people live in Aargau?

Around 653 337 people call Aargau home, spread across 1 404 km².

How big is Aargau?

Aargau takes up 1 404 km², which is roughly 542 square miles.

Is Aargau a canton or a city?

Aargau is a canton, one of 26 member states of the Swiss Confederation. Each one has its own constitution, parliament, government, and courts. Its administrative capital is Aarau.

What language is spoken in Aargau?

The official language of Aargau is German.

How many districts does Aargau have?

Aargau is divided into 11 districts (Bezirke). These include Bezirk Laufenburg, Bezirk Baden, Bezirk Zofingen, Bezirk Muri, Bezirk Brugg and 6 more , each forming a second-level administrative subdivision of the canton.

What postal codes does Aargau use?

Aargau uses 236 postal code areas. Swiss codes are always 4 digits long. Codes here start with 5, 4, 8, 6.