Castelsardo is a medium-sized municipality in the province of Sassari, Sardegna region. With a population of 5624 inhabitants and a density of 0 per km², it covers an area of 0.0 km². The average declared income is 17.290 €.

Population Trend

Male/Female Ratio

5624Totale
Men
Women

Demographic Statistics

Men2820
Women2804
Year2026

Demographic Indices

+0.43%
Annual change
change from the previous year
335.8
Ageing index
65+ / 0-14 × 100
62
Dependency ratio
(0-14 + 65+) / 15-64 × 100
174.5
Workforce replacement
60-64 / 15-19 × 100
167.8
Workforce structure
40-64 / 15-39 × 100
11.2
Child dependency
0-4 / women 15-49 × 100
49.65
Average age
weighted average age

Births (recent years)

Historical Population (1951-present)

Marital Status (2026)

0Totale
Single
Married
Divorced
Widowed

School-Age Population (2026)

Total 0-18 years: 694

Foreign residents

Foreign presence and top citizenships

Main citizenships
Foreign residents
163
Foreign-resident share: 2.91%
Main citizenships
Romania34
Ucraina15
Cina14
Marocco11
Nigeria11
Source: ISTAT 2025, MEF 2023, ISPRA 2024, EEA 2022 · Year: 2025