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Population & demographics
All demographic data for Siano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Siano.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Siano.
Siano is a medium-sized municipality in the province of Salerno, Campania region. With a population of 9226 inhabitants and a density of 1087 per km², it covers an area of 8.5 km². The average declared income is 19.571 €.
Siano in numbers: the analysis
Demographic projections to 2050 estimate about 7,971 inhabitants for Siano: an expected decline of 13.6% from today.
Among the 158 municipalities of the province of Salerno, Siano ranks 27 by population.
Siano has grown substantially since 1951: from 6,036 inhabitants then to 9,226 in 2026, an increase of 52.8%.
The generational balance is in line with the norm: the ageing index of Siano is 183 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 9628 |
| 2020 | 9563 |
| 2021 | 9464 |
| 2022 | 9496 |
| 2023 | 9424 |
| 2024 | 9382 |
| 2025 | 9282 |
| 2026 | 9226 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 4545 | 49.3% |
| Women | 4681 | 50.7% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 82 |
| 2022 | 90 |
| 2023 | 59 |
| 2024 | 59 |
| 2025 | 59 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 6036 |
| 1961 | 6905 |
| 1971 | 6932 |
| 1981 | 7834 |
| 1991 | 9265 |
| 2001 | 10.104 |
| 2011 | 10.074 |
| 2019 | 9628 |
| 2020 | 9563 |
| 2021 | 9464 |
| 2022 | 9496 |
| 2023 | 9424 |
| 2024 | 9382 |
| 2025 | 9282 |
| 2026 | 9226 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 8050 | 43.4% |
| Married | 9016 | 48.6% |
| Divorced | 236 | 1.3% |
| Widowed | 1262 | 6.8% |
School-Age Population (2026)
Total 0-18 years: 1554
| Valore | |
|---|---|
| Nido (0-2) | 182 |
| Infanzia (3-5) | 236 |
| Primaria (6-10) | 367 |
| Medie (11-13) | 271 |
| Superiori (14-18) | 498 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Siano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/siano-065142" title="Population pyramid of Siano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/siano-065142" alt="Population pyramid of Siano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>