Castel d'Aiano: 1969 inhabitants (2026)
ISTAT Code: 037013
44.2807°N, 11.0013°E
Explore related data
Jump from local statistics to linked rankings and territorial pages.
Region page
Open the full profile page for Emilia-Romagna.
Province page
Open the full profile page for the province of Bologna.
Income overview
Explore the income map and the municipalities with the highest and lowest values.
Regional income ranking
View the municipalities in Emilia-Romagna ranked by average income.
Provincial population ranking
View the municipalities in the province of Bologna ranked by population.
Compare this municipality
Open the comparison page with this municipality preselected.
Population & demographics
All demographic data for Castel d'Aiano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castel d'Aiano.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castel d'Aiano.
Castel d'Aiano is a small municipality in the province of Bologna, Emilia-Romagna region. With a population of 1969 inhabitants and a density of 43 per km², it covers an area of 45.5 km². The average declared income is 22.345 €.
Castel d'Aiano in numbers: the analysis
The census record tells a story of long decline: in 1951 Castel d'Aiano had 3,977 inhabitants; today (2026) it has 1,969 — 50.5% fewer.
The ageing index is one of the starkest signals: in Castel d'Aiano there are 376 residents over 65 for every 100 under 14, well above the national average.
Looking ahead to 2050, projections give Castel d'Aiano about 2,333 inhabitants, up 18.5% from today.
Compared with the provincial average of Bologna (about 18,623 residents per municipality), Castel d'Aiano is a markedly smaller centre.
Among the 55 municipalities of the province of Bologna, Castel d'Aiano ranks 52 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1874 |
| 2020 | 1865 |
| 2021 | 1857 |
| 2022 | 1886 |
| 2023 | 1896 |
| 2024 | 1905 |
| 2025 | 1922 |
| 2026 | 1969 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1038 | 52.7% |
| Women | 931 | 47.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 4 |
| 2022 | 16 |
| 2023 | 10 |
| 2024 | 7 |
| 2025 | 8 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3977 |
| 1961 | 2787 |
| 1971 | 2047 |
| 1981 | 1860 |
| 1991 | 1740 |
| 2001 | 1822 |
| 2011 | 1951 |
| 2019 | 1874 |
| 2020 | 1865 |
| 2021 | 1857 |
| 2022 | 1886 |
| 2023 | 1896 |
| 2024 | 1905 |
| 2025 | 1922 |
| 2026 | 1969 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1630 | 42.4% |
| Married | 1692 | 44.0% |
| Divorced | 202 | 5.3% |
| Widowed | 320 | 8.3% |
School-Age Population (2026)
Total 0-18 years: 237
| Valore | |
|---|---|
| Nido (0-2) | 26 |
| Infanzia (3-5) | 33 |
| Primaria (6-10) | 60 |
| Medie (11-13) | 36 |
| Superiori (14-18) | 82 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castel d'Aiano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castel-d-aiano-037013" title="Population pyramid of Castel d'Aiano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castel-d-aiano-037013" alt="Population pyramid of Castel d'Aiano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>