Explore related data
Jump from local statistics to linked rankings and territorial pages.
Region page
Open the full profile page for Toscana.
Province page
Open the full profile page for the province of Siena.
Income overview
Explore the income map and the municipalities with the highest and lowest values.
Regional income ranking
View the municipalities in Toscana ranked by average income.
Provincial population ranking
View the municipalities in the province of Siena ranked by population.
Compare this municipality
Open the comparison page with this municipality preselected.
Population & demographics
All demographic data for Chiusi: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Chiusi.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Chiusi.
Chiusi is a medium-sized municipality in the province of Siena, Toscana region. With a population of 8052 inhabitants and a density of 139 per km², it covers an area of 58.0 km². The average declared income is 22.769 €.
Chiusi in numbers: the analysis
Demographic projections to 2050 estimate about 7,074 inhabitants for Chiusi: an expected decline of 12.1% from today.
The ageing index is one of the starkest signals: in Chiusi there are 289 residents over 65 for every 100 under 14, well above the national average.
The census record tells a story of long decline: in 1951 Chiusi had 8,674 inhabitants; today (2026) it has 8,052 — 7.2% fewer.
Among the 35 municipalities of the province of Siena, Chiusi ranks 10 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 8362 |
| 2020 | 8303 |
| 2021 | 8124 |
| 2022 | 8051 |
| 2023 | 8100 |
| 2024 | 8116 |
| 2025 | 8081 |
| 2026 | 8052 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 4034 | 50.1% |
| Women | 4018 | 49.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 57 |
| 2022 | 54 |
| 2023 | 52 |
| 2024 | 34 |
| 2025 | 39 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 8674 |
| 1961 | 8848 |
| 1971 | 8771 |
| 1981 | 9244 |
| 1991 | 9103 |
| 2001 | 8612 |
| 2011 | 8836 |
| 2019 | 8362 |
| 2020 | 8303 |
| 2021 | 8124 |
| 2022 | 8051 |
| 2023 | 8100 |
| 2024 | 8116 |
| 2025 | 8081 |
| 2026 | 8052 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 6912 | 42.8% |
| Married | 7240 | 44.8% |
| Divorced | 560 | 3.5% |
| Widowed | 1450 | 9.0% |
School-Age Population (2026)
Total 0-18 years: 1108
| Valore | |
|---|---|
| Nido (0-2) | 128 |
| Infanzia (3-5) | 153 |
| Primaria (6-10) | 284 |
| Medie (11-13) | 177 |
| Superiori (14-18) | 366 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Chiusi population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/chiusi-052011" title="Population pyramid of Chiusi — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/chiusi-052011" alt="Population pyramid of Chiusi — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>