Castelletto d'Erro: 115 inhabitants (2026)
ISTAT Code: 006048
44.6251°N, 8.3944°E
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Population & demographics
All demographic data for Castelletto d'Erro: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castelletto d'Erro.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Castelletto d'Erro.
Castelletto d'Erro is a small municipality in the province of Alessandria, Piemonte region. With a population of 115 inhabitants and a density of 23 per km², it covers an area of 5.0 km². The average declared income is 19.428 €.
Castelletto d'Erro in numbers: the analysis
The ageing index is one of the starkest signals: in Castelletto d'Erro there are 960 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 55 inhabitants for Castelletto d'Erro: an expected decline of 52.2% from today.
Compared with the provincial average of Alessandria (about 2,182 residents per municipality), Castelletto d'Erro is a markedly smaller centre.
Among the 187 municipalities of the province of Alessandria, Castelletto d'Erro ranks 182 by population.
The census record tells a story of long decline: in 1951 Castelletto d'Erro had 385 inhabitants; today (2026) it has 115 — 70.1% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 148 |
| 2020 | 142 |
| 2021 | 143 |
| 2022 | 135 |
| 2023 | 130 |
| 2024 | 128 |
| 2025 | 127 |
| 2026 | 115 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 55 | 47.8% |
| Women | 60 | 52.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 0 |
| 2022 | 0 |
| 2023 | 0 |
| 2024 | 1 |
| 2025 | 1 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 385 |
| 1961 | 276 |
| 1971 | 245 |
| 1981 | 196 |
| 1991 | 167 |
| 2001 | 153 |
| 2011 | 150 |
| 2019 | 148 |
| 2020 | 142 |
| 2021 | 143 |
| 2022 | 135 |
| 2023 | 130 |
| 2024 | 128 |
| 2025 | 127 |
| 2026 | 115 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 100 | 39.4% |
| Married | 102 | 40.2% |
| Divorced | 14 | 5.5% |
| Widowed | 38 | 15.0% |
School-Age Population (2026)
Total 0-18 years: 7
| Valore | |
|---|---|
| Nido (0-2) | 2 |
| Infanzia (3-5) | 1 |
| Primaria (6-10) | 1 |
| Medie (11-13) | 0 |
| Superiori (14-18) | 3 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castelletto d'Erro population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castelletto-d-erro-006048" title="Population pyramid of Castelletto d'Erro — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castelletto-d-erro-006048" alt="Population pyramid of Castelletto d'Erro — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>