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Population & demographics
All demographic data for Castel del Piano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castel del Piano.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castel del Piano.
Castel del Piano is a small municipality in the province of Grosseto, Toscana region. With a population of 4803 inhabitants and a density of 71 per km², it covers an area of 67.8 km². The average declared income is 21.484 €.
Castel del Piano in numbers: the analysis
Compared with the provincial average of Grosseto (about 7,674 residents per municipality), Castel del Piano is a markedly smaller centre.
Among the 28 municipalities of the province of Grosseto, Castel del Piano ranks 10 by population.
The census record tells a story of long decline: in 1951 Castel del Piano had 5,783 inhabitants; today (2026) it has 4,803 — 16.9% fewer.
The generational balance is in line with the norm: the ageing index of Castel del Piano is 237 (over-65s per 100 under-14s).
For 2050 the projections point to an essentially unchanged population: about 4,890 inhabitants.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 4778 |
| 2020 | 4802 |
| 2021 | 4813 |
| 2022 | 4808 |
| 2023 | 4753 |
| 2024 | 4771 |
| 2025 | 4792 |
| 2026 | 4803 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 2440 | 50.8% |
| Women | 2363 | 49.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 28 |
| 2022 | 24 |
| 2023 | 24 |
| 2024 | 30 |
| 2025 | 16 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 5783 |
| 1961 | 5252 |
| 1971 | 4610 |
| 1981 | 4376 |
| 1991 | 4376 |
| 2001 | 4331 |
| 2011 | 4671 |
| 2019 | 4778 |
| 2020 | 4802 |
| 2021 | 4813 |
| 2022 | 4808 |
| 2023 | 4753 |
| 2024 | 4771 |
| 2025 | 4792 |
| 2026 | 4803 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 4156 | 43.4% |
| Married | 4080 | 42.6% |
| Divorced | 458 | 4.8% |
| Widowed | 890 | 9.3% |
School-Age Population (2026)
Total 0-18 years: 753
| Valore | |
|---|---|
| Nido (0-2) | 69 |
| Infanzia (3-5) | 102 |
| Primaria (6-10) | 215 |
| Medie (11-13) | 121 |
| Superiori (14-18) | 246 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castel del Piano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castel-del-piano-053004" title="Population pyramid of Castel del Piano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castel-del-piano-053004" alt="Population pyramid of Castel del Piano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>