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Population & demographics
All demographic data for Piansano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Piansano.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Piansano.
Piansano is a small municipality in the province of Viterbo, Lazio region. With a population of 2039 inhabitants and a density of 76 per km², it covers an area of 26.7 km². The average declared income is 18.280 €.
Piansano in numbers: the analysis
The ageing index is one of the starkest signals: in Piansano there are 325 residents over 65 for every 100 under 14, well above the national average.
Looking ahead to 2050, projections give Piansano about 2,279 inhabitants, up 11.8% from today.
Compared with the provincial average of Viterbo (about 5,130 residents per municipality), Piansano is a markedly smaller centre.
Among the 60 municipalities of the province of Viterbo, Piansano ranks 39 by population.
The census record tells a story of long decline: in 1951 Piansano had 2,882 inhabitants; today (2026) it has 2,039 — 29.3% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1974 |
| 2020 | 1968 |
| 2021 | 1922 |
| 2022 | 1886 |
| 2023 | 1928 |
| 2024 | 1998 |
| 2025 | 2016 |
| 2026 | 2039 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1070 | 52.5% |
| Women | 969 | 47.5% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 7 |
| 2022 | 10 |
| 2023 | 8 |
| 2024 | 8 |
| 2025 | 8 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 2882 |
| 1961 | 2486 |
| 1971 | 2295 |
| 1981 | 2337 |
| 1991 | 2306 |
| 2001 | 2220 |
| 2011 | 2147 |
| 2019 | 1974 |
| 2020 | 1968 |
| 2021 | 1922 |
| 2022 | 1886 |
| 2023 | 1928 |
| 2024 | 1998 |
| 2025 | 2016 |
| 2026 | 2039 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1542 | 38.2% |
| Married | 1972 | 48.9% |
| Divorced | 156 | 3.9% |
| Widowed | 362 | 9.0% |
School-Age Population (2026)
Total 0-18 years: 246
| Valore | |
|---|---|
| Nido (0-2) | 22 |
| Infanzia (3-5) | 39 |
| Primaria (6-10) | 69 |
| Medie (11-13) | 52 |
| Superiori (14-18) | 64 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Piansano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/piansano-056043" title="Population pyramid of Piansano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/piansano-056043" alt="Population pyramid of Piansano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>