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  1. Home
  2. Emilia-Romagna
  3. Bologna
  4. 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 44 per km², it covers an area of 45.3 km². The average declared income is 22.345 €.

Emilia-RomagnaBologna

Castel d'Aiano

ISTAT Code: 037013

44.2807°N, 11.0013°E

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2.0k
Inhabitants
44
Inhabitants/km²
22.345 €
Average Income
13.79 µg/m³
PM2.5
5,3%
Land Consumption
45.3 km²
Area

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Population Trend

Male/Female Ratio

1969Totale
Men
Women

Demographic Statistics

Men1038
Women931
Year2026

Demographic Indices

+2.45%
Annual change
change from the previous year
376
Ageing index
65+ / 0-14 × 100
67.7
Dependency ratio
(0-14 + 65+) / 15-64 × 100
200
Workforce replacement
60-64 / 15-19 × 100
160.9
Workforce structure
40-64 / 15-39 × 100
16.8
Child dependency
0-4 / women 15-49 × 100
50.7
Average age
weighted average age

Births (recent years)

Historical Population (1951-present)

Marital Status (2025)

3844Totale
Single
Married
Divorced
Widowed

School-Age Population (2026)

Total 0-18 years: 237

Foreign residents

Foreign presence and top citizenships

Main citizenships
Foreign residents
179
Foreign-resident share: 9.31%
Main citizenships
Romania54
India27
Marocco26
Cina9
Tunisia9

Municipalities in the same province

Alto Reno Terme

Bologna, Emilia-Romagna

Anzola dell'Emilia

Bologna, Emilia-Romagna

Argelato

Bologna, Emilia-Romagna

Baricella

Bologna, Emilia-Romagna

Bentivoglio

Bologna, Emilia-Romagna

Municipalities in the same region

Agazzano

Piacenza, Emilia-Romagna

Albareto

Parma, Emilia-Romagna

Albinea

Reggio nell'Emilia, Emilia-Romagna

Alfonsine

Ravenna, Emilia-Romagna

Alseno

Piacenza, Emilia-Romagna

Alta Val Tidone

Piacenza, Emilia-Romagna

Municipalities with similar population

Montefiore Conca

2.313 · Rimini, Emilia-Romagna

Masi Torello

2.299 · Ferrara, Emilia-Romagna

Travo

2.205 · Piacenza, Emilia-Romagna

Lizzano in Belvedere

2.204 · Bologna, Emilia-Romagna

Pianello Val Tidone

2.178 · Piacenza, Emilia-Romagna

Tizzano Val Parma

2.164 · Parma, Emilia-Romagna

Source: ISTAT 2025, MEF 2023, ISPRA 2024, EEA 2022 · Year: 2025