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Population & demographics
All demographic data for San Casciano dei Bagni: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Casciano dei Bagni.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for San Casciano dei Bagni.
San Casciano dei Bagni is a small municipality in the province of Siena, Toscana region. With a population of 1417 inhabitants and a density of 15 per km², it covers an area of 92.8 km². The average declared income is 23.038 €.
San Casciano dei Bagni in numbers: the analysis
The ageing index is one of the starkest signals: in San Casciano dei Bagni there are 529 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 978 inhabitants for San Casciano dei Bagni: an expected decline of 31% from today.
Compared with the provincial average of Siena (about 7,414 residents per municipality), San Casciano dei Bagni is a markedly smaller centre.
Among the 35 municipalities of the province of Siena, San Casciano dei Bagni ranks 32 by population.
The census record tells a story of long decline: in 1951 San Casciano dei Bagni had 3,819 inhabitants; today (2026) it has 1,417 — 62.9% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1579 |
| 2020 | 1577 |
| 2021 | 1546 |
| 2022 | 1516 |
| 2023 | 1495 |
| 2024 | 1444 |
| 2025 | 1421 |
| 2026 | 1417 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 709 | 50.0% |
| Women | 708 | 50.0% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 9 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 4 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3819 |
| 1961 | 3231 |
| 1971 | 2461 |
| 1981 | 2146 |
| 1991 | 1977 |
| 2001 | 1745 |
| 2011 | 1637 |
| 2019 | 1579 |
| 2020 | 1577 |
| 2021 | 1546 |
| 2022 | 1516 |
| 2023 | 1495 |
| 2024 | 1444 |
| 2025 | 1421 |
| 2026 | 1417 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1138 | 40.0% |
| Married | 1318 | 46.4% |
| Divorced | 88 | 3.1% |
| Widowed | 298 | 10.5% |
School-Age Population (2026)
Total 0-18 years: 144
| Valore | |
|---|---|
| Nido (0-2) | 13 |
| Infanzia (3-5) | 21 |
| Primaria (6-10) | 43 |
| Medie (11-13) | 17 |
| Superiori (14-18) | 50 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Casciano dei Bagni population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-casciano-dei-bagni-052027" title="Population pyramid of San Casciano dei Bagni — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-casciano-dei-bagni-052027" alt="Population pyramid of San Casciano dei Bagni — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>