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Population & demographics
All demographic data for Ostra: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Ostra.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Ostra.
Ostra is a medium-sized municipality in the province of Ancona, Marche region. With a population of 6216 inhabitants and a density of 133 per km², it covers an area of 46.6 km². The average declared income is 22.157 €.
Ostra in numbers: the analysis
The generational balance is in line with the norm: the ageing index of Ostra is 232 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 4,924 inhabitants for Ostra: an expected decline of 20.8% from today.
Compared with the provincial average of Ancona (about 9,822 residents per municipality), Ostra is a markedly smaller centre.
Among the 47 municipalities of the province of Ancona, Ostra ranks 16 by population.
The census record tells a story of long decline: in 1951 Ostra had 7,702 inhabitants; today (2026) it has 6,216 — 19.3% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 6653 |
| 2020 | 6543 |
| 2021 | 6464 |
| 2022 | 6398 |
| 2023 | 6287 |
| 2024 | 6264 |
| 2025 | 6251 |
| 2026 | 6216 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 3053 | 49.1% |
| Women | 3163 | 50.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 36 |
| 2022 | 25 |
| 2023 | 45 |
| 2024 | 31 |
| 2025 | 25 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 7702 |
| 1961 | 6742 |
| 1971 | 5886 |
| 1981 | 5927 |
| 1991 | 5847 |
| 2001 | 6028 |
| 2011 | 6743 |
| 2019 | 6653 |
| 2020 | 6543 |
| 2021 | 6464 |
| 2022 | 6398 |
| 2023 | 6287 |
| 2024 | 6264 |
| 2025 | 6251 |
| 2026 | 6216 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 5330 | 42.6% |
| Married | 5736 | 45.9% |
| Divorced | 346 | 2.8% |
| Widowed | 1090 | 8.7% |
School-Age Population (2026)
Total 0-18 years: 972
| Valore | |
|---|---|
| Nido (0-2) | 103 |
| Infanzia (3-5) | 110 |
| Primaria (6-10) | 258 |
| Medie (11-13) | 188 |
| Superiori (14-18) | 313 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Ostra population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/ostra-042035" title="Population pyramid of Ostra — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/ostra-042035" alt="Population pyramid of Ostra — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>