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Population & demographics
All demographic data for Castello dell'Acqua: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castello dell'Acqua.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Castello dell'Acqua.
Castello dell'Acqua is a small municipality in the province of Sondrio, Lombardia region. With a population of 607 inhabitants and a density of 43 per km², it covers an area of 14.2 km². The average declared income is 21.300 €.
Castello dell'Acqua in numbers: the analysis
The ageing index is one of the starkest signals: in Castello dell'Acqua there are 365 residents over 65 for every 100 under 14, well above the national average.
The census record tells a story of long decline: in 1951 Castello dell'Acqua had 1,174 inhabitants; today (2026) it has 607 — 48.3% fewer.
Among the 77 municipalities of the province of Sondrio, Castello dell'Acqua ranks 59 by population.
Compared with the provincial average of Sondrio (about 2,328 residents per municipality), Castello dell'Acqua is a markedly smaller centre.
For 2050 the projections point to an essentially unchanged population: about 610 inhabitants.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 606 |
| 2020 | 613 |
| 2021 | 606 |
| 2022 | 615 |
| 2023 | 597 |
| 2024 | 606 |
| 2025 | 602 |
| 2026 | 607 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 304 | 50.1% |
| Women | 303 | 49.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 5 |
| 2022 | 4 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 3 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1174 |
| 1961 | 1041 |
| 1971 | 843 |
| 1981 | 776 |
| 1991 | 740 |
| 2001 | 700 |
| 2011 | 643 |
| 2019 | 606 |
| 2020 | 613 |
| 2021 | 606 |
| 2022 | 615 |
| 2023 | 597 |
| 2024 | 606 |
| 2025 | 602 |
| 2026 | 607 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 492 | 40.9% |
| Married | 516 | 42.9% |
| Divorced | 68 | 5.6% |
| Widowed | 128 | 10.6% |
School-Age Population (2026)
Total 0-18 years: 71
| Valore | |
|---|---|
| Nido (0-2) | 10 |
| Infanzia (3-5) | 13 |
| Primaria (6-10) | 14 |
| Medie (11-13) | 11 |
| Superiori (14-18) | 23 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castello dell'Acqua population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castello-dell-acqua-014014" title="Population pyramid of Castello dell'Acqua — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castello-dell-acqua-014014" alt="Population pyramid of Castello dell'Acqua — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>