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Population & demographics
All demographic data for Castelli: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castelli.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castelli.
Castelli is a small municipality in the province of Teramo, Abruzzo region. With a population of 907 inhabitants and a density of 18 per km², it covers an area of 49.6 km². The average declared income is 16.224 €.
Castelli in numbers: the analysis
Compared with the provincial average of Teramo (about 6,379 residents per municipality), Castelli is a markedly smaller centre.
Among the 47 municipalities of the province of Teramo, Castelli ranks 39 by population.
The census record tells a story of long decline: in 1951 Castelli had 3,961 inhabitants; today (2026) it has 907 — 77.1% fewer.
The ageing index is one of the starkest signals: in Castelli there are 433 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 521 inhabitants for Castelli: an expected decline of 42.6% from today.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1066 |
| 2020 | 1028 |
| 2021 | 990 |
| 2022 | 997 |
| 2023 | 976 |
| 2024 | 944 |
| 2025 | 933 |
| 2026 | 907 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 458 | 50.5% |
| Women | 449 | 49.5% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 3 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3961 |
| 1961 | 3201 |
| 1971 | 2131 |
| 1981 | 1784 |
| 1991 | 1600 |
| 2001 | 1391 |
| 2011 | 1224 |
| 2019 | 1066 |
| 2020 | 1028 |
| 2021 | 990 |
| 2022 | 997 |
| 2023 | 976 |
| 2024 | 944 |
| 2025 | 933 |
| 2026 | 907 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 764 | 40.9% |
| Married | 878 | 47.1% |
| Divorced | 42 | 2.3% |
| Widowed | 182 | 9.8% |
School-Age Population (2026)
Total 0-18 years: 91
| Valore | |
|---|---|
| Nido (0-2) | 9 |
| Infanzia (3-5) | 12 |
| Primaria (6-10) | 30 |
| Medie (11-13) | 13 |
| Superiori (14-18) | 27 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castelli population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castelli-067012" title="Population pyramid of Castelli — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castelli-067012" alt="Population pyramid of Castelli — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>