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Population & demographics
All demographic data for Decimomannu: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Decimomannu.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Decimomannu.
Decimomannu is a medium-sized municipality in the province of Cagliari, Sardegna region. With a population of 8375 inhabitants and a density of 300 per km², it covers an area of 28.0 km². The average declared income is 21.236 €.
Decimomannu in numbers: the analysis
Compared with the provincial average of Cagliari (about 24,463 residents per municipality), Decimomannu is a markedly smaller centre.
Few municipalities in Sardegna are larger: it ranks no. 36 by population out of 377.
Among the 17 municipalities of the province of Cagliari, Decimomannu ranks 12 by population.
Decimomannu has grown substantially since 1951: from 3,181 inhabitants then to 8,375 in 2026, an increase of 163.3%.
The generational balance is in line with the norm: the ageing index of Decimomannu is 203 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Decimomannu about 8,840 inhabitants, up 5.6% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 8244 |
| 2020 | 8282 |
| 2021 | 8222 |
| 2022 | 8336 |
| 2023 | 8390 |
| 2024 | 8385 |
| 2025 | 8358 |
| 2026 | 8375 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 4197 | 50.1% |
| Women | 4178 | 49.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 51 |
| 2022 | 59 |
| 2023 | 54 |
| 2024 | 34 |
| 2025 | 34 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3181 |
| 1961 | 4534 |
| 1971 | 4823 |
| 1981 | 5587 |
| 1991 | 6332 |
| 2001 | 6836 |
| 2011 | 7831 |
| 2019 | 8244 |
| 2020 | 8282 |
| 2021 | 8222 |
| 2022 | 8336 |
| 2023 | 8390 |
| 2024 | 8385 |
| 2025 | 8358 |
| 2026 | 8375 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 7778 | 46.5% |
| Married | 7400 | 44.3% |
| Divorced | 674 | 4.0% |
| Widowed | 864 | 5.2% |
School-Age Population (2026)
Total 0-18 years: 1230
| Valore | |
|---|---|
| Nido (0-2) | 135 |
| Infanzia (3-5) | 158 |
| Primaria (6-10) | 303 |
| Medie (11-13) | 229 |
| Superiori (14-18) | 405 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Decimomannu population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/decimomannu-092015" title="Population pyramid of Decimomannu — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/decimomannu-092015" alt="Population pyramid of Decimomannu — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>