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Population & demographics
All demographic data for Castelliri: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castelliri.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castelliri.
Castelliri is a small municipality in the province of Frosinone, Lazio region. With a population of 3089 inhabitants and a density of 201 per km², it covers an area of 15.3 km². The average declared income is 20.263 €.
Castelliri in numbers: the analysis
The census record tells a story of long decline: in 1951 Castelliri had 3,252 inhabitants; today (2026) it has 3,089 — 5% fewer.
Among the 91 municipalities of the province of Frosinone, Castelliri ranks 34 by population.
Compared with the provincial average of Frosinone (about 5,058 residents per municipality), Castelliri is a markedly smaller centre.
Demographic projections to 2050 estimate about 2,320 inhabitants for Castelliri: an expected decline of 24.9% from today.
The generational balance is in line with the norm: the ageing index of Castelliri is 231 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 3358 |
| 2020 | 3306 |
| 2021 | 3256 |
| 2022 | 3202 |
| 2023 | 3199 |
| 2024 | 3176 |
| 2025 | 3154 |
| 2026 | 3089 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1521 | 49.2% |
| Women | 1568 | 50.8% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 20 |
| 2022 | 19 |
| 2023 | 20 |
| 2024 | 13 |
| 2025 | 13 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 3252 |
| 1961 | 2906 |
| 1971 | 2596 |
| 1981 | 3178 |
| 1991 | 3521 |
| 2001 | 3560 |
| 2011 | 3533 |
| 2019 | 3358 |
| 2020 | 3306 |
| 2021 | 3256 |
| 2022 | 3202 |
| 2023 | 3199 |
| 2024 | 3176 |
| 2025 | 3154 |
| 2026 | 3089 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 2540 | 40.3% |
| Married | 3162 | 50.1% |
| Divorced | 146 | 2.3% |
| Widowed | 460 | 7.3% |
School-Age Population (2026)
Total 0-18 years: 486
| Valore | |
|---|---|
| Nido (0-2) | 44 |
| Infanzia (3-5) | 59 |
| Primaria (6-10) | 147 |
| Medie (11-13) | 84 |
| Superiori (14-18) | 152 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castelliri population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castelliri-060020" title="Population pyramid of Castelliri — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castelliri-060020" alt="Population pyramid of Castelliri — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>