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Population & demographics
All demographic data for Sezze: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Sezze.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Sezze.
Sezze is a medium-sized municipality in the province of Latina, Lazio region. With a population of 23.766 inhabitants and a density of 237 per km², it covers an area of 100,5 km². The average declared income is 18.281 €.
Sezze in numbers: the analysis
The generational balance is in line with the norm: the ageing index of Sezze is 185 (over-65s per 100 under-14s).
For 2050 the projections point to an essentially unchanged population: about 24,298 inhabitants.
Few municipalities in Lazio are larger: it ranks no. 30 by population out of 378.
Among the 33 municipalities of the province of Latina, Sezze ranks 7 by population.
Sezze has grown substantially since 1951: from 18,393 inhabitants then to 23,766 in 2026, an increase of 29.2%.
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: 3803
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Sezze population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/sezze-059028" title="Population pyramid of Sezze — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/sezze-059028" alt="Population pyramid of Sezze — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>