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Population & demographics
All demographic data for Sostegno: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Sostegno.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Sostegno.
Sostegno is a small municipality in the province of Biella, Piemonte region. With a population of 732 inhabitants and a density of 40 per km², it covers an area of 18.2 km². The average declared income is 26.670 €.
Sostegno in numbers: the analysis
The census record tells a story of long decline: in 1951 Sostegno had 939 inhabitants; today (2026) it has 732 — 22% fewer.
The ageing index is one of the starkest signals: in Sostegno there are 309 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 618 inhabitants for Sostegno: an expected decline of 15.6% from today.
Compared with the provincial average of Biella (about 2,273 residents per municipality), Sostegno is a markedly smaller centre.
Among the 74 municipalities of the province of Biella, Sostegno ranks 48 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 769 |
| 2020 | 765 |
| 2021 | 750 |
| 2022 | 740 |
| 2023 | 731 |
| 2024 | 733 |
| 2025 | 729 |
| 2026 | 732 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 353 | 48.2% |
| Women | 379 | 51.8% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 2 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 939 |
| 1961 | 932 |
| 1971 | 839 |
| 1981 | 790 |
| 1991 | 773 |
| 2001 | 784 |
| 2011 | 751 |
| 2019 | 769 |
| 2020 | 765 |
| 2021 | 750 |
| 2022 | 740 |
| 2023 | 731 |
| 2024 | 733 |
| 2025 | 729 |
| 2026 | 732 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 634 | 43.5% |
| Married | 624 | 42.8% |
| Divorced | 72 | 4.9% |
| Widowed | 128 | 8.8% |
School-Age Population (2026)
Total 0-18 years: 90
| Valore | |
|---|---|
| Nido (0-2) | 6 |
| Infanzia (3-5) | 12 |
| Primaria (6-10) | 27 |
| Medie (11-13) | 13 |
| Superiori (14-18) | 32 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Sostegno population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/sostegno-096064" title="Population pyramid of Sostegno — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/sostegno-096064" alt="Population pyramid of Sostegno — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>