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Population & demographics
All demographic data for Treviglio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Treviglio.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Treviglio.
Treviglio is a medium-sized municipality in the province of Bergamo, Lombardia region. With a population of 31.604 inhabitants and a density of 972 per km², it covers an area of 32.5 km². The average declared income is 29.541 €.
Treviglio in numbers: the analysis
By population, Treviglio ranks no. 2 among the 243 municipalities of the province of Bergamo.
Treviglio has grown substantially since 1951: from 21,555 inhabitants then to 31,604 in 2026, an increase of 46.6%.
The generational balance is in line with the norm: the ageing index of Treviglio is 183 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Treviglio about 37,329 inhabitants, up 18.1% from today.
The average municipality in the province of Bergamo has about 4,606 residents: Treviglio has 6.9 times as many.
Few municipalities in Lombardia are larger: it ranks no. 40 by population out of 1502.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 30.106 |
| 2020 | 30.445 |
| 2021 | 30.557 |
| 2022 | 30.567 |
| 2023 | 30.793 |
| 2024 | 31.074 |
| 2025 | 31.417 |
| 2026 | 31.604 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 15.655 | 49.5% |
| Women | 15.949 | 50.5% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 212 |
| 2022 | 193 |
| 2023 | 213 |
| 2024 | 208 |
| 2025 | 212 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 21.555 |
| 1961 | 23.413 |
| 1971 | 25.989 |
| 1981 | 26.132 |
| 1991 | 25.299 |
| 2001 | 25.736 |
| 2011 | 28.410 |
| 2019 | 30.106 |
| 2020 | 30.445 |
| 2021 | 30.557 |
| 2022 | 30.567 |
| 2023 | 30.793 |
| 2024 | 31.074 |
| 2025 | 31.417 |
| 2026 | 31.604 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 28.360 | 45.2% |
| Married | 27.318 | 43.5% |
| Divorced | 2642 | 4.2% |
| Widowed | 4438 | 7.1% |
School-Age Population (2026)
Total 0-18 years: 5379
| Valore | |
|---|---|
| Nido (0-2) | 641 |
| Infanzia (3-5) | 663 |
| Primaria (6-10) | 1448 |
| Medie (11-13) | 933 |
| Superiori (14-18) | 1694 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Treviglio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/treviglio-016219" title="Population pyramid of Treviglio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/treviglio-016219" alt="Population pyramid of Treviglio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>