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Population & demographics
All demographic data for Sernio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Sernio.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Sernio.
Sernio is a small municipality in the province of Sondrio, Lombardia region. With a population of 500 inhabitants and a density of 52 per km², it covers an area of 9.5 km². The average declared income is 23.717 €.
Sernio in numbers: the analysis
The census record tells a story of long decline: in 1951 Sernio had 569 inhabitants; today (2026) it has 500 — 12.1% fewer.
The generational balance is in line with the norm: the ageing index of Sernio is 190 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Sernio about 543 inhabitants, up 8.6% from today.
Compared with the provincial average of Sondrio (about 2,328 residents per municipality), Sernio is a markedly smaller centre.
Among the 77 municipalities of the province of Sondrio, Sernio ranks 66 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 488 |
| 2020 | 487 |
| 2021 | 489 |
| 2022 | 475 |
| 2023 | 489 |
| 2024 | 484 |
| 2025 | 494 |
| 2026 | 500 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 253 | 50.6% |
| Women | 247 | 49.4% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 1 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 0 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 569 |
| 1961 | 521 |
| 1971 | 449 |
| 1981 | 454 |
| 1991 | 459 |
| 2001 | 445 |
| 2011 | 500 |
| 2019 | 488 |
| 2020 | 487 |
| 2021 | 489 |
| 2022 | 475 |
| 2023 | 489 |
| 2024 | 484 |
| 2025 | 494 |
| 2026 | 500 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 452 | 45.7% |
| Married | 410 | 41.5% |
| Divorced | 48 | 4.9% |
| Widowed | 78 | 7.9% |
School-Age Population (2026)
Total 0-18 years: 82
| Valore | |
|---|---|
| Nido (0-2) | 5 |
| Infanzia (3-5) | 6 |
| Primaria (6-10) | 32 |
| Medie (11-13) | 17 |
| Superiori (14-18) | 22 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Sernio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/sernio-014059" title="Population pyramid of Sernio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/sernio-014059" alt="Population pyramid of Sernio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>