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Population & demographics
All demographic data for Olzai: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Olzai.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Olzai.
Olzai is a small municipality in the province of Nuoro, Sardegna region. With a population of 752 inhabitants and a density of 11 per km², it covers an area of 69.0 km². The average declared income is 17.474 €.
Olzai in numbers: the analysis
The census record tells a story of long decline: in 1951 Olzai had 1,736 inhabitants; today (2026) it has 752 — 56.7% fewer.
The ageing index is one of the starkest signals: in Olzai there are 362 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 504 inhabitants for Olzai: an expected decline of 33% from today.
Compared with the provincial average of Nuoro (about 2,623 residents per municipality), Olzai is a markedly smaller centre.
Among the 74 municipalities of the province of Nuoro, Olzai ranks 57 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 845 |
| 2020 | 821 |
| 2021 | 792 |
| 2022 | 774 |
| 2023 | 766 |
| 2024 | 756 |
| 2025 | 755 |
| 2026 | 752 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 383 | 50.9% |
| Women | 369 | 49.1% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 8 |
| 2024 | 3 |
| 2025 | 6 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1736 |
| 1961 | 1884 |
| 1971 | 1481 |
| 1981 | 1278 |
| 1991 | 1162 |
| 2001 | 1046 |
| 2011 | 903 |
| 2019 | 845 |
| 2020 | 821 |
| 2021 | 792 |
| 2022 | 774 |
| 2023 | 766 |
| 2024 | 756 |
| 2025 | 755 |
| 2026 | 752 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 722 | 47.8% |
| Married | 584 | 38.7% |
| Divorced | 26 | 1.7% |
| Widowed | 178 | 11.8% |
School-Age Population (2026)
Total 0-18 years: 93
| Valore | |
|---|---|
| Nido (0-2) | 18 |
| Infanzia (3-5) | 12 |
| Primaria (6-10) | 22 |
| Medie (11-13) | 13 |
| Superiori (14-18) | 28 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Olzai population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/olzai-091057" title="Population pyramid of Olzai — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/olzai-091057" alt="Population pyramid of Olzai — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>