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Population & demographics
All demographic data for Siamaggiore: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Siamaggiore.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Siamaggiore.
Siamaggiore is a small municipality in the province of Oristano, Sardegna region. With a population of 848 inhabitants and a density of 63 per km², it covers an area of 13.4 km². The average declared income is 18.321 €.
Siamaggiore in numbers: the analysis
Compared with the provincial average of Oristano (about 1,687 residents per municipality), Siamaggiore is a markedly smaller centre.
Among the 87 municipalities of the province of Oristano, Siamaggiore ranks 42 by population.
Siamaggiore has grown substantially since 1951: from 739 inhabitants then to 848 in 2026, an increase of 14.7%.
The ageing index is one of the starkest signals: in Siamaggiore there are 375 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 673 inhabitants for Siamaggiore: an expected decline of 20.6% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 907 |
| 2020 | 903 |
| 2021 | 892 |
| 2022 | 884 |
| 2023 | 870 |
| 2024 | 866 |
| 2025 | 861 |
| 2026 | 848 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 421 | 49.6% |
| Women | 427 | 50.4% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 6 |
| 2024 | 5 |
| 2025 | 3 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 739 |
| 1961 | 871 |
| 1971 | 853 |
| 1981 | 881 |
| 1991 | 936 |
| 2001 | 996 |
| 2011 | 970 |
| 2019 | 907 |
| 2020 | 903 |
| 2021 | 892 |
| 2022 | 884 |
| 2023 | 870 |
| 2024 | 866 |
| 2025 | 861 |
| 2026 | 848 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 708 | 41.1% |
| Married | 840 | 48.8% |
| Divorced | 54 | 3.1% |
| Widowed | 120 | 7.0% |
School-Age Population (2026)
Total 0-18 years: 95
| Valore | |
|---|---|
| Nido (0-2) | 14 |
| Infanzia (3-5) | 7 |
| Primaria (6-10) | 34 |
| Medie (11-13) | 15 |
| Superiori (14-18) | 25 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Siamaggiore population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/siamaggiore-095056" title="Population pyramid of Siamaggiore — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/siamaggiore-095056" alt="Population pyramid of Siamaggiore — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>