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Population & demographics
All demographic data for Petriolo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Petriolo.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Petriolo.
Petriolo is a small municipality in the province of Macerata, Marche region. With a population of 1821 inhabitants and a density of 115 per km², it covers an area of 15.9 km². The average declared income is 21.830 €.
Petriolo in numbers: the analysis
Compared with the provincial average of Macerata (about 5,485 residents per municipality), Petriolo is a markedly smaller centre.
Among the 55 municipalities of the province of Macerata, Petriolo ranks 30 by population.
The census record tells a story of long decline: in 1951 Petriolo had 2,263 inhabitants; today (2026) it has 1,821 — 19.5% fewer.
The generational balance is in line with the norm: the ageing index of Petriolo is 242 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 1,511 inhabitants for Petriolo: an expected decline of 17% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1923 |
| 2020 | 1881 |
| 2021 | 1868 |
| 2022 | 1843 |
| 2023 | 1835 |
| 2024 | 1825 |
| 2025 | 1815 |
| 2026 | 1821 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 914 | 50.2% |
| Women | 907 | 49.8% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 9 |
| 2022 | 7 |
| 2023 | 11 |
| 2024 | 10 |
| 2025 | 11 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 2263 |
| 1961 | 2019 |
| 1971 | 1906 |
| 1981 | 1962 |
| 1991 | 1977 |
| 2001 | 2049 |
| 2011 | 1977 |
| 2019 | 1923 |
| 2020 | 1881 |
| 2021 | 1868 |
| 2022 | 1843 |
| 2023 | 1835 |
| 2024 | 1825 |
| 2025 | 1815 |
| 2026 | 1821 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1496 | 41.2% |
| Married | 1750 | 48.2% |
| Divorced | 80 | 2.2% |
| Widowed | 304 | 8.4% |
School-Age Population (2026)
Total 0-18 years: 290
| Valore | |
|---|---|
| Nido (0-2) | 33 |
| Infanzia (3-5) | 39 |
| Primaria (6-10) | 80 |
| Medie (11-13) | 54 |
| Superiori (14-18) | 84 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Petriolo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/petriolo-043036" title="Population pyramid of Petriolo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/petriolo-043036" alt="Population pyramid of Petriolo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>