Which quarters belong to Kreis 3 Seen in Winterthur?

Kreis 3 Seen contains 10 statistical quarters: Waser, Büelwiesen, Ganzenbühl, Oberseen, Sennhof, Waldegg, Iberg, Sonnenberg, Gotzenwil, Eidberg. Together they have 20'854 residents (BFS, 2024).

Does Kreis 3 Seen have its own postal code?

No. City districts are a statistical and political subdivision of the municipality, while postal codes are delivery areas — the boundaries do not coincide.

Which numbers does Kreis 3 Seen carry?

Kreis 3 Seen carries district number 3; the municipality of Winterthur has BFS municipality number 230. The district itself has no BFS number — its quarters carry BFS quarter codes that start with 230.

SwitzerlandZurichBezirk WinterthurWinterthurCity district

Kreis 3 Seen

Winterthur

Kreis 3 Seen is one of 7 city districts of Winterthur and covers 10 statistical quarters with 20'854 residents between them. The district sits between the municipality and the quarter — it is not a postal delivery area and does not line up with postal codes.

ZH CANTON MunicipalityWinterthur DistrictBezirk WinterthurDistrict number3BFS municipality number230

Relief © swisstopo · TINITALY · geoland.at · LGL · IGN

The district in numbers

BFS · 2024

Residents: 20'854
Quarters: 10
Households: 8'789
Foreign: 23.6%

No median age is given for the district: a weighted mean of per-quarter medians is not a median. Median ages are shown per quarter.

STATPOP 2024 · Federal Statistical Office (FSO), retrieved 08.08.2026

Votes in Kreis 3 Seen

Counting-district results, as BFS publishes them

14.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)Federal● Accepted · 52.5% Yes

49.6% YesNo 50.4%

14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»Federal● Rejected · 45.2% Yes

41.5% YesNo 58.5%

14.06.2026Kantonale Volksinitiative «Stopp Prämien-Schock: Für eine automatische Entlastung bei den Krankenkassenprämien»Cantonal ZH● Accepted · 53.1% Yes

53.2% YesNo 46.8%

14.06.2026C. Stichfrage: Welche der beiden Vorlagen soll in Kraft treten, falls sowohl die kantonale Volksinitiative als auch der Gegenvorschlag des Kantonsrates angenommen werden?Cantonal ZH● Rejected · 41.1% Yes

39.8% YesNo 60.2%

14.06.2026B. Gegenvorschlag des KantonsratesCantonal ZH● Accepted · 54.3% Yes

53.7% YesNo 46.3%

14.06.2026A. Kantonale Volksinitiative «Bezahlbare Wohnungen schützen. Leerkündigungen stoppen (Wohnschutz-Initiative)»Cantonal ZH● Rejected · 42.7% Yes

42.2% YesNo 57.8%

38.5% YesNo 61.5%

14.06.2026B. Gegenvorschlag des Kantonsrates vom 17. November 2025Cantonal ZH● Accepted · 57.9% Yes

57.6% YesNo 42.4%

14.06.2026A. Kantonale Volksinitiative für mehr günstige und gemeinnützige Wohnungen («Wohnungsinitiative»)Cantonal ZH● Rejected · 40.3% Yes

40.5% YesNo 59.5%

14.06.2026Kantonale Volksinitiative «Wohneigentum wieder ermöglichen (Wohneigentums-Initiative)»Cantonal ZH● Rejected · 25.1% Yes

26.5% YesNo 73.5%

All federal votes →

Volksabstimmungen (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 19.09.2026

What a city district does not have

Winterthur

Workplaces, climate, mobility and party strengths are published per municipality only — see Winterthur. → Winterthur
A city district has no tax rate of its own — the municipality of Winterthur sets it. → Winterthur

Electricity (municipality of Winterthur)

ElCom · 2027 · BFE

Tariff H428.09 Rp./kWh

Roof potential466 GWh/yr

Per inhabitant3'860 kWh/yr

All energy rankings →

Housing (municipality of Winterthur)

ARE

Second homes6.7 %

Health-insurance premiums

BAG · 2024

Premium regionRegion 2

Ø premium in canton Zurich411 CHF/mo

Estimate Switzerland 2026465.3 CHF/mo

Canton Zurich →Premiums explained →

Premiums are set per canton and premium region. This area lies in premium region 2 of canton Zurich. Shown is the average adult premium paid across the whole canton Zurich (2024, BAG) — a region-specific average is not available in the cantonal data.

Quarters in this district

BFS · 10

Waser230310

5'556Residents

Median age: 42.5
Foreign: 27.1%

Büelwiesen230315

3'229Residents

Median age: 41
Foreign: 32.3%

Ganzenbühl230330

3'105Residents

Median age: 41.5
Foreign: 26.9%

Oberseen230350

2'750Residents

Median age: 46.2
Foreign: 13.3%

Sennhof230390

1'775Residents

Median age: 35.5
Foreign: 33.1%

Waldegg230320

1'408Residents

Median age: 49.8
Foreign: 17.8%

Iberg230380

1'176Residents

Median age: 43.8
Foreign: 12.1%

Sonnenberg230340

943Residents

Median age: 50.5
Foreign: 10.5%

Gotzenwil230360

721Residents

Median age: 46.2
Foreign: 9.4%

Eidberg230370

191Residents

Median age: 41
Foreign: 11.0%

Postal codes in this district

Σ quarter shares · 2

No postal code belongs to a city district: PLZ are Swiss Post delivery areas and do not follow district borders. The percentage is the share of that PLZ’s area that lies inside Kreis 3 Seen — the sum over its quarters.

840595.6%of this PLZ

via Eidberg 21.8%, Oberseen 15.8%, Iberg 11.4%, Ganzenbühl 11.2%, Sonnenberg 11.2%, Gotzenwil 9.9%, Waser 5.3%, Büelwiesen 3.6%, Waldegg 3.6%, Sennhof 1.8%

848262.0%of this PLZ

via Sennhof 49.2%, Iberg 12.8%

Which quarters belong to Kreis 3 Seen in Winterthur?: Kreis 3 Seen contains 10 statistical quarters: Waser, Büelwiesen, Ganzenbühl, Oberseen, Sennhof, Waldegg, Iberg, Sonnenberg, Gotzenwil, Eidberg. Together they have 20'854 residents (BFS, 2024).
Does Kreis 3 Seen have its own postal code?: No. City districts are a statistical and political subdivision of the municipality, while postal codes are delivery areas — the boundaries do not coincide.
Which numbers does Kreis 3 Seen carry?: Kreis 3 Seen carries district number 3; the municipality of Winterthur has BFS municipality number 230. The district itself has no BFS number — its quarters carry BFS quarter codes that start with 230.

City districts exist only in Zürich (12) and Winterthur (7). No other Swiss municipality has this level.