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Population & demographics
All demographic data for Colliano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Colliano.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Colliano.
Colliano is a small municipality in the province of Salerno, Campania region. With a population of 3387 inhabitants and a density of 61 per km², it covers an area of 55.6 km². The average declared income is 15.360 €.
Colliano in numbers: the analysis
Demographic projections to 2050 estimate about 2,931 inhabitants for Colliano: an expected decline of 13.5% from today.
Compared with the provincial average of Salerno (about 6,666 residents per municipality), Colliano is a markedly smaller centre.
Among the 158 municipalities of the province of Salerno, Colliano ranks 60 by population.
The census record tells a story of long decline: in 1951 Colliano had 4,186 inhabitants; today (2026) it has 3,387 — 19.1% fewer.
The generational balance is in line with the norm: the ageing index of Colliano is 177 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 3533 |
| 2020 | 3489 |
| 2021 | 3436 |
| 2022 | 3455 |
| 2023 | 3444 |
| 2024 | 3405 |
| 2025 | 3404 |
| 2026 | 3387 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1661 | 49.0% |
| Women | 1726 | 51.0% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 31 |
| 2022 | 32 |
| 2023 | 31 |
| 2024 | 34 |
| 2025 | 24 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 4186 |
| 1961 | 4332 |
| 1971 | 4224 |
| 1981 | 3857 |
| 1991 | 3997 |
| 2001 | 3830 |
| 2011 | 3764 |
| 2019 | 3533 |
| 2020 | 3489 |
| 2021 | 3436 |
| 2022 | 3455 |
| 2023 | 3444 |
| 2024 | 3405 |
| 2025 | 3404 |
| 2026 | 3387 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 2718 | 39.9% |
| Married | 3376 | 49.6% |
| Divorced | 106 | 1.6% |
| Widowed | 608 | 8.9% |
School-Age Population (2026)
Total 0-18 years: 564
| Valore | |
|---|---|
| Nido (0-2) | 88 |
| Infanzia (3-5) | 89 |
| Primaria (6-10) | 152 |
| Medie (11-13) | 98 |
| Superiori (14-18) | 137 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Colliano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/colliano-065043" title="Population pyramid of Colliano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/colliano-065043" alt="Population pyramid of Colliano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>