Explore related data
Jump from local statistics to linked rankings and territorial pages.
Region page
Open the full profile page for Lombardia.
Province page
Open the full profile page for the province of Sondrio.
Income overview
Explore the income map and the municipalities with the highest and lowest values.
Regional income ranking
View the municipalities in Lombardia ranked by average income.
Provincial population ranking
View the municipalities in the province of Sondrio ranked by population.
Compare this municipality
Open the comparison page with this municipality preselected.
Population & demographics
All demographic data for Cosio Valtellino: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Cosio Valtellino.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Cosio Valtellino.
Cosio Valtellino is a medium-sized municipality in the province of Sondrio, Lombardia region. With a population of 5586 inhabitants and a density of 235 per km², it covers an area of 23.8 km². The average declared income is 25.017 €.
Cosio Valtellino in numbers: the analysis
By population, Cosio Valtellino ranks no. 6 among the 77 municipalities of the province of Sondrio.
Cosio Valtellino has grown substantially since 1951: from 3,194 inhabitants then to 5,586 in 2026, an increase of 74.9%.
The generational balance is in line with the norm: the ageing index of Cosio Valtellino is 214 (over-65s per 100 under-14s).
Looking ahead to 2050, projections give Cosio Valtellino about 5,866 inhabitants, up 5% from today.
The average municipality in the province of Sondrio has about 2,328 residents: Cosio Valtellino has 2.4 times as many.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 5507 |
| 2020 | 5445 |
| 2021 | 5409 |
| 2022 | 5482 |
| 2023 | 5526 |
| 2024 | 5541 |
| 2025 | 5559 |
| 2026 | 5586 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 2832 | 50.7% |
| Women | 2754 | 49.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 32 |
| 2022 | 47 |
| 2023 | 40 |
| 2024 | 39 |
| 2025 | 37 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3194 |
| 1961 | 3505 |
| 1971 | 4413 |
| 1981 | 4757 |
| 1991 | 4990 |
| 2001 | 5135 |
| 2011 | 5400 |
| 2019 | 5507 |
| 2020 | 5445 |
| 2021 | 5409 |
| 2022 | 5482 |
| 2023 | 5526 |
| 2024 | 5541 |
| 2025 | 5559 |
| 2026 | 5586 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 4874 | 43.8% |
| Married | 4936 | 44.4% |
| Divorced | 468 | 4.2% |
| Widowed | 840 | 7.6% |
School-Age Population (2026)
Total 0-18 years: 890
| Valore | |
|---|---|
| Nido (0-2) | 121 |
| Infanzia (3-5) | 128 |
| Primaria (6-10) | 222 |
| Medie (11-13) | 133 |
| Superiori (14-18) | 286 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Cosio Valtellino population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/cosio-valtellino-014024" title="Population pyramid of Cosio Valtellino — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/cosio-valtellino-014024" alt="Population pyramid of Cosio Valtellino — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>