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Population & demographics
All demographic data for Treglio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Treglio.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Treglio.
Treglio is a small municipality in the province of Chieti, Abruzzo region. With a population of 1721 inhabitants and a density of 337 per km², it covers an area of 5.1 km². The average declared income is 22.331 €.
Treglio in numbers: the analysis
Treglio has grown substantially since 1951: from 1,122 inhabitants then to 1,721 in 2026, an increase of 53.4%.
Among the 104 municipalities of the province of Chieti, Treglio ranks 38 by population.
Compared with the provincial average of Chieti (about 3,549 residents per municipality), Treglio is a markedly smaller centre.
Looking ahead to 2050, projections give Treglio about 1,960 inhabitants, up 13.9% from today.
The generational balance is in line with the norm: the ageing index of Treglio is 176 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1657 |
| 2020 | 1681 |
| 2021 | 1687 |
| 2022 | 1730 |
| 2023 | 1739 |
| 2024 | 1711 |
| 2025 | 1714 |
| 2026 | 1721 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 846 | 49.2% |
| Women | 875 | 50.8% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 14 |
| 2022 | 12 |
| 2023 | 10 |
| 2024 | 8 |
| 2025 | 8 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1122 |
| 1961 | 942 |
| 1971 | 769 |
| 1981 | 879 |
| 1991 | 1133 |
| 2001 | 1236 |
| 2011 | 1575 |
| 2019 | 1657 |
| 2020 | 1681 |
| 2021 | 1687 |
| 2022 | 1730 |
| 2023 | 1739 |
| 2024 | 1711 |
| 2025 | 1714 |
| 2026 | 1721 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1426 | 41.6% |
| Married | 1636 | 47.7% |
| Divorced | 144 | 4.2% |
| Widowed | 222 | 6.5% |
School-Age Population (2026)
Total 0-18 years: 295
| Valore | |
|---|---|
| Nido (0-2) | 26 |
| Infanzia (3-5) | 39 |
| Primaria (6-10) | 87 |
| Medie (11-13) | 45 |
| Superiori (14-18) | 98 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Treglio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/treglio-069096" title="Population pyramid of Treglio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/treglio-069096" alt="Population pyramid of Treglio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>