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SwitzerlandBasel-CityBaselStatistical city quarter

Kleinbasel Altstadt

in Basel

Kleinbasel Altstadt is one of 19 statistical quarters of Basel. Statistical quarters are the official subdivision of a municipality — they are not postal delivery areas and do not line up with postal codes.

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Residents
2'318
Median age
42.9
Foreign
41.4%
Swiss
58.6%
Density
7'244 per km²
Households
1'339
Avg. household size
1.6
Living space/person
43 m²
STATPOP 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026

Kleinbasel Altstadt is a BFS statistical quarter and lies unambiguously in the municipality of Basel. No postal code belongs to a quarter, though: PLZ are Swiss Post delivery areas and overlap several quarters. The percentages say how much of each PLZ’s area lies in Kleinbasel Altstadt — there is no clear-cut “belongs to” relation.

BFS quarter number2701012
MunicipalityBaselBFS 2701
  • Vote results are not published per quarter — the result of the municipality of Basel applies. → Basel
  • Workplaces, climate, mobility and party strengths are published per municipality only — see Basel. → Basel

These postal codes overlap the quarter Kleinbasel Altstadt. The percentage says how much of THAT POSTAL CODE’s area falls in this quarter — not the other way round.

Municipal tax multiplier50%
Cantonal tax multiplier50%
50%BS range 37.5%50%
Tax rank 3 of 3 in canton Basel-City
Tax burden
Single, 100'000 CHF gross income
14'659 CHF(14.7%)
Rank 3 of 3 in the canton · 959 of 2110 in Switzerland
Median canton 13'363 CHF · median Switzerland 15'290 CHF
Cheapest Bettingen 13'039 CHF · most expensive Basel 14'659 CHF
Income tax as % of gross income
0%8%15%23%30%40k50k100k150k200k250k300k
100'000 CHF:14'659 CHF(~14.7%)
BaselCanton range Basel-CitySwitzerland median
Show data table
Gross incomeBaselBasel-CitySwitzerland median
40'0004.9%4.3–4.9%5.4%
50'0007.8%6.9–7.8%7.8%
60'0009.9%8.7–9.9%10.5%
70'00011.5%10.1–11.5%11.9%
80'00012.7%11.2–12.7%13.1%
90'00013.6%12.1–13.6%14.1%
100'00014.7%13–14.7%15.3%
110'00015.6%13.9–15.6%16.3%
120'00016.3%14.6–16.3%17.2%
130'00017%15.2–17%18.1%
140'00017.7%15.8–17.7%19%
150'00018.3%16.4–18.3%19.7%
175'00019.7%17.7–19.7%21.6%
200'00020.9%18.9–20.9%23.2%
225'00021.9%19.9–21.9%24.6%
250'00022.8%20.8–22.8%25.8%
275'00023.8%21.6–23.8%26.8%
300'00024.9%22.7–24.9%27.4%
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Tariff H433.42 Rp./kWh
Roof potential546 GWh/yr
Per inhabitant3'030 kWh/yr
All energy rankings →
Second homes10.8 %
Ø premium in canton Basel-City523 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo

Premiums are set not per municipality but per canton and premium region. Shown is the average adult premium paid in canton Basel-City (2024, BAG) — it applies canton-wide, not to any single location.

Map

OpenStreetMap · Quarter outline, district and municipality
Which municipality is the quarter Kleinbasel Altstadt in?
The quarter Kleinbasel Altstadt is a statistical quarter of the municipality of Basel. It has 2'318 residents (BFS, 2024).
What is the postal code of the quarter Kleinbasel Altstadt?
Kleinbasel Altstadt has no postal code of its own. Postal codes are delivery areas and do not follow quarter boundaries — 4058 overlap Kleinbasel Altstadt.
Which BFS number does the Kleinbasel Altstadt quarter carry?
The statistical quarter Kleinbasel Altstadt carries BFS quarter code 2701012; it starts with the BFS municipality number 2701 of Basel.

Statistical quarters exist only for the 10 cities in the BFS City Statistics programme. The BFS keeps no quarter statistics for any other municipality.