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Population & demographics
All demographic data for Seggiano: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Seggiano.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Seggiano.
Seggiano is a small municipality in the province of Grosseto, Toscana region. With a population of 1054 inhabitants and a density of 21 per km², it covers an area of 49,4 km². The average declared income is 19.806 €.
Seggiano in numbers: the analysis
The ageing index is one of the starkest signals: in Seggiano there are 277 residents over 65 for every 100 under 14, well above the national average.
Looking ahead to 2050, projections give Seggiano about 1,377 inhabitants, up 30.6% from today.
Compared with the provincial average of Grosseto (about 7,674 residents per municipality), Seggiano is a markedly smaller centre.
Among the 28 municipalities of the province of Grosseto, Seggiano ranks 26 by population.
The census record tells a story of long decline: in 1951 Seggiano had 2,242 inhabitants; today (2026) it has 1,054 — 53% fewer.
Population Trend
Male/Female Ratio
Demographic Statistics
Demographic Indices
Births (recent years)
Historical Population (1951-present)
Marital Status (2025)
School-Age Population (2026)
Total 0-18 years: 145
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Seggiano population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/seggiano-053025" title="Population pyramid of Seggiano — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/seggiano-053025" alt="Population pyramid of Seggiano — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>