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Population & demographics
All demographic data for Onifai: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Onifai.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Onifai.
Onifai is a small municipality in the province of Nuoro, Sardegna region. With a population of 728 inhabitants and a density of 17 per km², it covers an area of 43.2 km². The average declared income is 16.365 €.
Onifai in numbers: the analysis
Compared with the provincial average of Nuoro (about 2,623 residents per municipality), Onifai is a markedly smaller centre.
Among the 74 municipalities of the province of Nuoro, Onifai ranks 58 by population.
The census record tells a story of long decline: in 1951 Onifai had 888 inhabitants; today (2026) it has 728 — 18% fewer.
The ageing index is one of the starkest signals: in Onifai there are 296 residents over 65 for every 100 under 14, well above the national average.
For 2050 the projections point to an essentially unchanged population: about 749 inhabitants.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 722 |
| 2020 | 719 |
| 2021 | 709 |
| 2022 | 697 |
| 2023 | 709 |
| 2024 | 718 |
| 2025 | 705 |
| 2026 | 728 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 341 | 46.8% |
| Women | 387 | 53.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 3 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 888 |
| 1961 | 1015 |
| 1971 | 847 |
| 1981 | 805 |
| 1991 | 746 |
| 2001 | 766 |
| 2011 | 742 |
| 2019 | 722 |
| 2020 | 719 |
| 2021 | 709 |
| 2022 | 697 |
| 2023 | 709 |
| 2024 | 718 |
| 2025 | 705 |
| 2026 | 728 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 672 | 47.7% |
| Married | 584 | 41.4% |
| Divorced | 38 | 2.7% |
| Widowed | 116 | 8.2% |
School-Age Population (2026)
Total 0-18 years: 103
| Valore | |
|---|---|
| Nido (0-2) | 9 |
| Infanzia (3-5) | 11 |
| Primaria (6-10) | 30 |
| Medie (11-13) | 18 |
| Superiori (14-18) | 35 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Onifai population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/onifai-091059" title="Population pyramid of Onifai — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/onifai-091059" alt="Population pyramid of Onifai — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>