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Population & demographics
All demographic data for San Siro: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Siro.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Siro.
San Siro is a small municipality in the province of Como, Lombardia region. With a population of 1672 inhabitants and a density of 89 per km², it covers an area of 18.8 km². The average declared income is 20.248 €.
San Siro in numbers: the analysis
Compared with the provincial average of Como (about 4,072 residents per municipality), San Siro is a markedly smaller centre.
Among the 147 municipalities of the province of Como, San Siro ranks 86 by population.
The census record tells a story of long decline: in 1951 San Siro had 2,470 inhabitants; today (2026) it has 1,672 — 32.3% fewer.
The ageing index is one of the starkest signals: in San Siro there are 294 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 1,502 inhabitants for San Siro: an expected decline of 10.2% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1725 |
| 2020 | 1739 |
| 2021 | 1718 |
| 2022 | 1693 |
| 2023 | 1683 |
| 2024 | 1681 |
| 2025 | 1664 |
| 2026 | 1672 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 833 | 49.8% |
| Women | 839 | 50.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 9 |
| 2022 | 9 |
| 2023 | 10 |
| 2024 | 9 |
| 2025 | 13 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 2470 |
| 1961 | 2267 |
| 1971 | 2238 |
| 1981 | 2062 |
| 1991 | 1985 |
| 2001 | 1865 |
| 2011 | 1758 |
| 2019 | 1725 |
| 2020 | 1739 |
| 2021 | 1718 |
| 2022 | 1693 |
| 2023 | 1683 |
| 2024 | 1681 |
| 2025 | 1664 |
| 2026 | 1672 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1414 | 42.5% |
| Married | 1458 | 43.8% |
| Divorced | 130 | 3.9% |
| Widowed | 326 | 9.8% |
School-Age Population (2026)
Total 0-18 years: 207
| Valore | |
|---|---|
| Nido (0-2) | 34 |
| Infanzia (3-5) | 31 |
| Primaria (6-10) | 52 |
| Medie (11-13) | 37 |
| Superiori (14-18) | 53 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Siro population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-siro-013248" title="Population pyramid of San Siro — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-siro-013248" alt="Population pyramid of San Siro — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>