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Population & demographics
All demographic data for Sini: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Sini.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Sini.
Sini is a small municipality in the province of Oristano, Sardegna region. With a population of 520 inhabitants and a density of 60 per km², it covers an area of 8.7 km². The average declared income is 15.062 €.
Sini in numbers: the analysis
The ageing index is one of the starkest signals: in Sini there are 711 residents over 65 for every 100 under 14, well above the national average.
Looking ahead to 2050, projections give Sini about 575 inhabitants, up 10.6% from today.
Compared with the provincial average of Oristano (about 1,687 residents per municipality), Sini is a markedly smaller centre.
Among the 87 municipalities of the province of Oristano, Sini ranks 55 by population.
The census record tells a story of long decline: in 1951 Sini had 993 inhabitants; today (2026) it has 520 — 47.6% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 505 |
| 2020 | 492 |
| 2021 | 491 |
| 2022 | 485 |
| 2023 | 441 |
| 2024 | 494 |
| 2025 | 469 |
| 2026 | 520 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 301 | 57.9% |
| Women | 219 | 42.1% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 0 |
| 2023 | 0 |
| 2024 | 0 |
| 2025 | 1 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 993 |
| 1961 | 959 |
| 1971 | 793 |
| 1981 | 767 |
| 1991 | 679 |
| 2001 | 597 |
| 2011 | 515 |
| 2019 | 505 |
| 2020 | 492 |
| 2021 | 491 |
| 2022 | 485 |
| 2023 | 441 |
| 2024 | 494 |
| 2025 | 469 |
| 2026 | 520 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 426 | 45.4% |
| Married | 412 | 43.9% |
| Divorced | 16 | 1.7% |
| Widowed | 84 | 9.0% |
School-Age Population (2026)
Total 0-18 years: 45
| Valore | |
|---|---|
| Nido (0-2) | 1 |
| Infanzia (3-5) | 2 |
| Primaria (6-10) | 13 |
| Medie (11-13) | 8 |
| Superiori (14-18) | 21 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Sini population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/sini-095060" title="Population pyramid of Sini — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/sini-095060" alt="Population pyramid of Sini — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>