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Population & demographics
All demographic data for Trezzano sul Naviglio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Trezzano sul Naviglio.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Trezzano sul Naviglio.
Trezzano sul Naviglio is a medium-sized municipality in the province of Milano, Lombardia region. With a population of 21.875 inhabitants and a density of 2042 per km², it covers an area of 10.7 km². The average declared income is 27.899 €.
Trezzano sul Naviglio in numbers: the analysis
Looking ahead to 2050, projections give Trezzano sul Naviglio about 25,281 inhabitants, up 15.6% from today.
The generational balance is in line with the norm: the ageing index of Trezzano sul Naviglio is 172 (over-65s per 100 under-14s).
Trezzano sul Naviglio has grown substantially since 1951: from 1,479 inhabitants then to 21,875 in 2026, an increase of 1,379%.
Among the 133 municipalities of the province of Milano, Trezzano sul Naviglio ranks 25 by population.
Few municipalities in Lombardia are larger: it ranks no. 61 by population out of 1502.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 20.971 |
| 2020 | 21.062 |
| 2021 | 21.453 |
| 2022 | 21.460 |
| 2023 | 21.520 |
| 2024 | 21.585 |
| 2025 | 21.738 |
| 2026 | 21.875 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 10.705 | 48.9% |
| Women | 11.170 | 51.1% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 158 |
| 2022 | 145 |
| 2023 | 146 |
| 2024 | 160 |
| 2025 | 169 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1479 |
| 1961 | 1452 |
| 1971 | 13.559 |
| 1981 | 17.685 |
| 1991 | 19.423 |
| 2001 | 18.114 |
| 2011 | 20.018 |
| 2019 | 20.971 |
| 2020 | 21.062 |
| 2021 | 21.453 |
| 2022 | 21.460 |
| 2023 | 21.520 |
| 2024 | 21.585 |
| 2025 | 21.738 |
| 2026 | 21.875 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 20.066 | 46.2% |
| Married | 18.766 | 43.2% |
| Divorced | 1958 | 4.5% |
| Widowed | 2660 | 6.1% |
School-Age Population (2026)
Total 0-18 years: 3826
| Valore | |
|---|---|
| Nido (0-2) | 491 |
| Infanzia (3-5) | 519 |
| Primaria (6-10) | 1019 |
| Medie (11-13) | 679 |
| Superiori (14-18) | 1118 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Trezzano sul Naviglio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/trezzano-sul-naviglio-015220" title="Population pyramid of Trezzano sul Naviglio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/trezzano-sul-naviglio-015220" alt="Population pyramid of Trezzano sul Naviglio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>