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Population & demographics
All demographic data for Castellanza: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castellanza.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castellanza.
Castellanza is a medium-sized municipality in the province of Varese, Lombardia region. With a population of 13.890 inhabitants and a density of 1984 per km², it covers an area of 7.0 km². The average declared income is 27.887 €.
Castellanza in numbers: the analysis
Demographic projections to 2050 estimate about 12,133 inhabitants for Castellanza: an expected decline of 12.6% from today.
The ageing index is one of the starkest signals: in Castellanza there are 269 residents over 65 for every 100 under 14, well above the national average.
Castellanza has grown substantially since 1951: from 10,154 inhabitants then to 13,890 in 2026, an increase of 36.8%.
By population, Castellanza ranks no. 13 among the 136 municipalities of the province of Varese.
Few municipalities in Lombardia are larger: it ranks no. 131 by population out of 1502.
The average municipality in the province of Varese has about 6,506 residents: Castellanza has 2.1 times as many.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 14.449 |
| 2020 | 14.370 |
| 2021 | 14.328 |
| 2022 | 14.077 |
| 2023 | 13.981 |
| 2024 | 13.899 |
| 2025 | 13.901 |
| 2026 | 13.890 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 6728 | 48.4% |
| Women | 7162 | 51.6% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 84 |
| 2022 | 100 |
| 2023 | 86 |
| 2024 | 95 |
| 2025 | 75 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 10.154 |
| 1961 | 12.140 |
| 1971 | 15.011 |
| 1981 | 15.936 |
| 1991 | 15.586 |
| 2001 | 14.569 |
| 2011 | 14.244 |
| 2019 | 14.449 |
| 2020 | 14.370 |
| 2021 | 14.328 |
| 2022 | 14.077 |
| 2023 | 13.981 |
| 2024 | 13.899 |
| 2025 | 13.901 |
| 2026 | 13.890 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 11.894 | 42.8% |
| Married | 12.480 | 44.9% |
| Divorced | 1088 | 3.9% |
| Widowed | 2340 | 8.4% |
School-Age Population (2026)
Total 0-18 years: 1975
| Valore | |
|---|---|
| Nido (0-2) | 254 |
| Infanzia (3-5) | 264 |
| Primaria (6-10) | 520 |
| Medie (11-13) | 346 |
| Superiori (14-18) | 591 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castellanza population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castellanza-012042" title="Population pyramid of Castellanza — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castellanza-012042" alt="Population pyramid of Castellanza — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>