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Population & demographics
All demographic data for Trevico: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Trevico.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Trevico.
Trevico is a small municipality in the province of Avellino, Campania region. With a population of 789 inhabitants and a density of 77 per km², it covers an area of 10.3 km². The average declared income is 18.449 €.
Trevico in numbers: the analysis
The census record tells a story of long decline: in 1951 Trevico had 1,881 inhabitants; today (2026) it has 789 — 58.1% fewer.
The ageing index is one of the starkest signals: in Trevico there are 397 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 466 inhabitants for Trevico: an expected decline of 40.9% from today.
Compared with the provincial average of Avellino (about 3,331 residents per municipality), Trevico is a markedly smaller centre.
Among the 118 municipalities of the province of Avellino, Trevico ranks 102 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 920 |
| 2020 | 904 |
| 2021 | 880 |
| 2022 | 867 |
| 2023 | 841 |
| 2024 | 826 |
| 2025 | 807 |
| 2026 | 789 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 385 | 48.8% |
| Women | 404 | 51.2% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 3 |
| 2025 | 0 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1881 |
| 1961 | 1706 |
| 1971 | 1758 |
| 1981 | 1798 |
| 1991 | 1636 |
| 2001 | 1284 |
| 2011 | 1072 |
| 2019 | 920 |
| 2020 | 904 |
| 2021 | 880 |
| 2022 | 867 |
| 2023 | 841 |
| 2024 | 826 |
| 2025 | 807 |
| 2026 | 789 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 556 | 34.4% |
| Married | 866 | 53.7% |
| Divorced | 16 | 1.0% |
| Widowed | 176 | 10.9% |
School-Age Population (2026)
Total 0-18 years: 90
| Valore | |
|---|---|
| Nido (0-2) | 6 |
| Infanzia (3-5) | 7 |
| Primaria (6-10) | 23 |
| Medie (11-13) | 21 |
| Superiori (14-18) | 33 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Trevico population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/trevico-064112" title="Population pyramid of Trevico — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/trevico-064112" alt="Population pyramid of Trevico — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>