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Population & demographics
All demographic data for Siziano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Siziano.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Siziano.
Siziano is a medium-sized municipality in the province of Pavia, Lombardia region. With a population of 6921 inhabitants and a density of 631 per km², it covers an area of 11.0 km². The average declared income is 28.537 €.
Siziano in numbers: the analysis
Looking ahead to 2050, projections give Siziano about 10,701 inhabitants, up 54.6% from today.
The average municipality in the province of Pavia has about 2,951 residents: Siziano has 2.3 times as many.
By population, Siziano ranks no. 10 among the 185 municipalities of the province of Pavia.
Siziano has grown substantially since 1951: from 2,290 inhabitants then to 6,921 in 2026, an increase of 202.2%.
The generational balance is in line with the norm: the ageing index of Siziano is 145 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 6095 |
| 2020 | 6215 |
| 2021 | 6351 |
| 2022 | 6451 |
| 2023 | 6544 |
| 2024 | 6674 |
| 2025 | 6810 |
| 2026 | 6921 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 3445 | 49.8% |
| Women | 3476 | 50.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 50 |
| 2022 | 57 |
| 2023 | 44 |
| 2024 | 57 |
| 2025 | 58 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 2290 |
| 1961 | 2411 |
| 1971 | 3003 |
| 1981 | 3294 |
| 1991 | 4119 |
| 2001 | 5226 |
| 2011 | 5807 |
| 2019 | 6095 |
| 2020 | 6215 |
| 2021 | 6351 |
| 2022 | 6451 |
| 2023 | 6544 |
| 2024 | 6674 |
| 2025 | 6810 |
| 2026 | 6921 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 6292 | 46.2% |
| Married | 5984 | 43.9% |
| Divorced | 598 | 4.4% |
| Widowed | 746 | 5.5% |
School-Age Population (2026)
Total 0-18 years: 1269
| Valore | |
|---|---|
| Nido (0-2) | 168 |
| Infanzia (3-5) | 178 |
| Primaria (6-10) | 341 |
| Medie (11-13) | 206 |
| Superiori (14-18) | 376 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Siziano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/siziano-018150" title="Population pyramid of Siziano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/siziano-018150" alt="Population pyramid of Siziano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>