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Population & demographics
All demographic data for Onanì: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Onanì.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Onanì.
Onanì is a small municipality in the province of Nuoro, Sardegna region. With a population of 337 inhabitants and a density of 5 per km², it covers an area of 72.1 km². The average declared income is 12.341 €.
Onanì in numbers: the analysis
Among the 74 municipalities of the province of Nuoro, Onanì ranks 71 by population.
The census record tells a story of long decline: in 1951 Onanì had 1,177 inhabitants; today (2026) it has 337 — 71.4% fewer.
The ageing index is one of the starkest signals: in Onanì there are 329 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 264 inhabitants for Onanì: an expected decline of 21.7% from today.
Compared with the provincial average of Nuoro (about 2,623 residents per municipality), Onanì is a markedly smaller centre.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 362 |
| 2020 | 369 |
| 2021 | 375 |
| 2022 | 373 |
| 2023 | 359 |
| 2024 | 353 |
| 2025 | 353 |
| 2026 | 337 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 164 | 48.7% |
| Women | 173 | 51.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 2 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1177 |
| 1961 | 1459 |
| 1971 | 1013 |
| 1981 | 730 |
| 1991 | 539 |
| 2001 | 473 |
| 2011 | 430 |
| 2019 | 362 |
| 2020 | 369 |
| 2021 | 375 |
| 2022 | 373 |
| 2023 | 359 |
| 2024 | 353 |
| 2025 | 353 |
| 2026 | 337 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 356 | 50.4% |
| Married | 262 | 37.1% |
| Divorced | 14 | 2.0% |
| Widowed | 74 | 10.5% |
School-Age Population (2026)
Total 0-18 years: 40
| Valore | |
|---|---|
| Nido (0-2) | 6 |
| Infanzia (3-5) | 7 |
| Primaria (6-10) | 12 |
| Medie (11-13) | 5 |
| Superiori (14-18) | 10 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Onanì population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/onani-091058" title="Population pyramid of Onanì — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/onani-091058" alt="Population pyramid of Onanì — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>