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Population & demographics
All demographic data for Trezzo sull'Adda: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Trezzo sull'Adda.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Trezzo sull'Adda.
Trezzo sull'Adda is a medium-sized municipality in the province of Milano, Lombardia region. With a population of 12.442 inhabitants and a density of 929 per km², it covers an area of 13.4 km². The average declared income is 26.644 €.
Trezzo sull'Adda in numbers: the analysis
The generational balance is in line with the norm: the ageing index of Trezzo sull'Adda is 226 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Trezzo sull'Adda about 14,214 inhabitants, up 14.2% from today.
Compared with the provincial average of Milano (about 24,459 residents per municipality), Trezzo sull'Adda is a markedly smaller centre.
Few municipalities in Lombardia are larger: it ranks no. 150 by population out of 1502.
Among the 133 municipalities of the province of Milano, Trezzo sull'Adda ranks 53 by population.
Trezzo sull'Adda has grown substantially since 1951: from 8,468 inhabitants then to 12,442 in 2026, an increase of 46.9%.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 11.968 |
| 2020 | 12.010 |
| 2021 | 11.981 |
| 2022 | 11.930 |
| 2023 | 11.966 |
| 2024 | 12.107 |
| 2025 | 12.220 |
| 2026 | 12.442 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 6145 | 49.4% |
| Women | 6297 | 50.6% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 84 |
| 2022 | 69 |
| 2023 | 80 |
| 2024 | 71 |
| 2025 | 58 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 8468 |
| 1961 | 8698 |
| 1971 | 9731 |
| 1981 | 10.313 |
| 1991 | 11.197 |
| 2001 | 11.596 |
| 2011 | 11.883 |
| 2019 | 11.968 |
| 2020 | 12.010 |
| 2021 | 11.981 |
| 2022 | 11.930 |
| 2023 | 11.966 |
| 2024 | 12.107 |
| 2025 | 12.220 |
| 2026 | 12.442 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 10.656 | 43.6% |
| Married | 10.854 | 44.4% |
| Divorced | 1052 | 4.3% |
| Widowed | 1878 | 7.7% |
School-Age Population (2026)
Total 0-18 years: 1884
| Valore | |
|---|---|
| Nido (0-2) | 203 |
| Infanzia (3-5) | 246 |
| Primaria (6-10) | 494 |
| Medie (11-13) | 346 |
| Superiori (14-18) | 595 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Trezzo sull'Adda population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/trezzo-sull-adda-015221" title="Population pyramid of Trezzo sull'Adda — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/trezzo-sull-adda-015221" alt="Population pyramid of Trezzo sull'Adda — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>