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Population & demographics
All demographic data for Ischia di Castro: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Ischia di Castro.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Ischia di Castro.
Ischia di Castro is a small municipality in the province of Viterbo, Lazio region. With a population of 2107 inhabitants and a density of 20 per km², it covers an area of 104.5 km². The average declared income is 17.744 €.
Ischia di Castro in numbers: the analysis
The ageing index is one of the starkest signals: in Ischia di Castro there are 348 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 1,721 inhabitants for Ischia di Castro: an expected decline of 18.3% from today.
Compared with the provincial average of Viterbo (about 5,130 residents per municipality), Ischia di Castro is a markedly smaller centre.
Among the 60 municipalities of the province of Viterbo, Ischia di Castro ranks 37 by population.
The census record tells a story of long decline: in 1951 Ischia di Castro had 3,188 inhabitants; today (2026) it has 2,107 — 33.9% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 2235 |
| 2020 | 2215 |
| 2021 | 2205 |
| 2022 | 2188 |
| 2023 | 2138 |
| 2024 | 2096 |
| 2025 | 2116 |
| 2026 | 2107 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1025 | 48.6% |
| Women | 1082 | 51.4% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 12 |
| 2022 | 8 |
| 2023 | 8 |
| 2024 | 9 |
| 2025 | 8 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3188 |
| 1961 | 3013 |
| 1971 | 2701 |
| 1981 | 2669 |
| 1991 | 2609 |
| 2001 | 2464 |
| 2011 | 2377 |
| 2019 | 2235 |
| 2020 | 2215 |
| 2021 | 2205 |
| 2022 | 2188 |
| 2023 | 2138 |
| 2024 | 2096 |
| 2025 | 2116 |
| 2026 | 2107 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1654 | 39.1% |
| Married | 2028 | 47.9% |
| Divorced | 124 | 2.9% |
| Widowed | 426 | 10.1% |
School-Age Population (2026)
Total 0-18 years: 257
| Valore | |
|---|---|
| Nido (0-2) | 28 |
| Infanzia (3-5) | 33 |
| Primaria (6-10) | 61 |
| Medie (11-13) | 48 |
| Superiori (14-18) | 87 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Ischia di Castro population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/ischia-di-castro-056031" title="Population pyramid of Ischia di Castro — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/ischia-di-castro-056031" alt="Population pyramid of Ischia di Castro — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>