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Population & demographics
All demographic data for Piglio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Piglio.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Piglio.
Piglio is a small municipality in the province of Frosinone, Lazio region. With a population of 4248 inhabitants and a density of 121 per km², it covers an area of 35.2 km². The average declared income is 21.197 €.
Piglio in numbers: the analysis
Demographic projections to 2050 estimate about 3,400 inhabitants for Piglio: an expected decline of 20% from today.
Among the 91 municipalities of the province of Frosinone, Piglio ranks 27 by population.
The census record tells a story of long decline: in 1951 Piglio had 4,641 inhabitants; today (2026) it has 4,248 — 8.5% fewer.
The ageing index is one of the starkest signals: in Piglio there are 291 residents over 65 for every 100 under 14, well above the national average.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 4533 |
| 2020 | 4468 |
| 2021 | 4386 |
| 2022 | 4382 |
| 2023 | 4387 |
| 2024 | 4331 |
| 2025 | 4300 |
| 2026 | 4248 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 2100 | 49.4% |
| Women | 2148 | 50.6% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 33 |
| 2022 | 32 |
| 2023 | 10 |
| 2024 | 25 |
| 2025 | 17 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 4641 |
| 1961 | 4422 |
| 1971 | 4357 |
| 1981 | 4561 |
| 1991 | 4734 |
| 2001 | 4700 |
| 2011 | 4657 |
| 2019 | 4533 |
| 2020 | 4468 |
| 2021 | 4386 |
| 2022 | 4382 |
| 2023 | 4387 |
| 2024 | 4331 |
| 2025 | 4300 |
| 2026 | 4248 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 3422 | 39.8% |
| Married | 4304 | 50.0% |
| Divorced | 186 | 2.2% |
| Widowed | 688 | 8.0% |
School-Age Population (2026)
Total 0-18 years: 564
| Valore | |
|---|---|
| Nido (0-2) | 58 |
| Infanzia (3-5) | 94 |
| Primaria (6-10) | 142 |
| Medie (11-13) | 87 |
| Superiori (14-18) | 183 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Piglio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/piglio-060053" title="Population pyramid of Piglio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/piglio-060053" alt="Population pyramid of Piglio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>