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Population & demographics
All demographic data for Monteroni d'Arbia: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Monteroni d'Arbia.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Monteroni d'Arbia.
Monteroni d'Arbia is a medium-sized municipality in the province of Siena, Toscana region. With a population of 9019 inhabitants and a density of 85 per km², it covers an area of 105.9 km². The average declared income is 24.560 €.
Monteroni d'Arbia in numbers: the analysis
The generational balance is in line with the norm: the ageing index of Monteroni d'Arbia is 168 (over-65s per 100 under-14s).
For 2050 the projections point to an essentially unchanged population: about 9,112 inhabitants.
Among the 35 municipalities of the province of Siena, Monteroni d'Arbia ranks 8 by population.
Monteroni d'Arbia has grown substantially since 1951: from 5,593 inhabitants then to 9,019 in 2026, an increase of 61.3%.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 8992 |
| 2020 | 8986 |
| 2021 | 9040 |
| 2022 | 8984 |
| 2023 | 9068 |
| 2024 | 9039 |
| 2025 | 9029 |
| 2026 | 9019 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 4431 | 49.1% |
| Women | 4588 | 50.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 70 |
| 2022 | 84 |
| 2023 | 68 |
| 2024 | 76 |
| 2025 | 57 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 5593 |
| 1961 | 4931 |
| 1971 | 4756 |
| 1981 | 5625 |
| 1991 | 6493 |
| 2001 | 7170 |
| 2011 | 8744 |
| 2019 | 8992 |
| 2020 | 8986 |
| 2021 | 9040 |
| 2022 | 8984 |
| 2023 | 9068 |
| 2024 | 9039 |
| 2025 | 9029 |
| 2026 | 9019 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 8188 | 45.3% |
| Married | 8122 | 45.0% |
| Divorced | 614 | 3.4% |
| Widowed | 1134 | 6.3% |
School-Age Population (2026)
Total 0-18 years: 1660
| Valore | |
|---|---|
| Nido (0-2) | 196 |
| Infanzia (3-5) | 228 |
| Primaria (6-10) | 442 |
| Medie (11-13) | 300 |
| Superiori (14-18) | 494 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Monteroni d'Arbia population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/monteroni-d-arbia-052017" title="Population pyramid of Monteroni d'Arbia — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/monteroni-d-arbia-052017" alt="Population pyramid of Monteroni d'Arbia — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>