Silius: 987 inhabitants (2026)
ISTAT Code: 111085
39.5175°N, 9.2959°E
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Population & demographics
All demographic data for Silius: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Silius.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Silius.
Silius is a small municipality in the province of Sud Sardegna, Sardegna region. With a population of 987 inhabitants and a density of 26 per km², it covers an area of 38.4 km². The average declared income is 15.522 €.
Silius in numbers: the analysis
Compared with the provincial average of Sud Sardegna (about 3,058 residents per municipality), Silius is a markedly smaller centre.
Among the 107 municipalities of the province of Sud Sardegna, Silius ranks 80 by population.
The census record tells a story of long decline: in 2019 Silius had 1,145 inhabitants; today (2026) it has 987 — 13.8% fewer.
The ageing index is one of the starkest signals: in Silius there are 457 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 593 inhabitants for Silius: an expected decline of 39.9% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1145 |
| 2020 | 1129 |
| 2021 | 1097 |
| 2022 | 1064 |
| 2023 | 1034 |
| 2024 | 1015 |
| 2025 | 1009 |
| 2026 | 987 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 532 | 53.9% |
| Women | 455 | 46.1% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 1 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 2019 | 1145 |
| 2020 | 1129 |
| 2021 | 1097 |
| 2022 | 1064 |
| 2023 | 1034 |
| 2024 | 1015 |
| 2025 | 1009 |
| 2026 | 987 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1038 | 51.4% |
| Married | 788 | 39.0% |
| Divorced | 18 | 0.9% |
| Widowed | 174 | 8.6% |
School-Age Population (2026)
Total 0-18 years: 100
| Valore | |
|---|---|
| Nido (0-2) | 6 |
| Infanzia (3-5) | 9 |
| Primaria (6-10) | 18 |
| Medie (11-13) | 20 |
| Superiori (14-18) | 47 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Silius population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/silius-111085" title="Population pyramid of Silius — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/silius-111085" alt="Population pyramid of Silius — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>