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Population & demographics
All demographic data for Castronno: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castronno.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Castronno.
Castronno is a medium-sized municipality in the province of Varese, Lombardia region. With a population of 5035 inhabitants and a density of 1387 per km², it covers an area of 3.6 km². The average declared income is 26.522 €.
Castronno in numbers: the analysis
Demographic projections to 2050 estimate about 4,707 inhabitants for Castronno: an expected decline of 6.5% from today.
Among the 136 municipalities of the province of Varese, Castronno ranks 49 by population.
Castronno has grown substantially since 1951: from 2,020 inhabitants then to 5,035 in 2026, an increase of 149.3%.
The generational balance is in line with the norm: the ageing index of Castronno is 246 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 5135 |
| 2020 | 5063 |
| 2021 | 5042 |
| 2022 | 5039 |
| 2023 | 5048 |
| 2024 | 5010 |
| 2025 | 4985 |
| 2026 | 5035 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 2553 | 50.7% |
| Women | 2482 | 49.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 34 |
| 2022 | 24 |
| 2023 | 33 |
| 2024 | 32 |
| 2025 | 35 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 2020 |
| 1961 | 2754 |
| 1971 | 3595 |
| 1981 | 4520 |
| 1991 | 4593 |
| 2001 | 4842 |
| 2011 | 5248 |
| 2019 | 5135 |
| 2020 | 5063 |
| 2021 | 5042 |
| 2022 | 5039 |
| 2023 | 5048 |
| 2024 | 5010 |
| 2025 | 4985 |
| 2026 | 5035 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 4222 | 42.3% |
| Married | 4678 | 46.9% |
| Divorced | 388 | 3.9% |
| Widowed | 682 | 6.8% |
School-Age Population (2026)
Total 0-18 years: 742
| Valore | |
|---|---|
| Nido (0-2) | 113 |
| Infanzia (3-5) | 104 |
| Primaria (6-10) | 160 |
| Medie (11-13) | 113 |
| Superiori (14-18) | 252 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castronno population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castronno-012047" title="Population pyramid of Castronno — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castronno-012047" alt="Population pyramid of Castronno — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>