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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 100.3 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
| Anno | Popolazione |
|---|---|
| 2019 | 23.613 |
| 2020 | 23.548 |
| 2021 | 23.576 |
| 2022 | 23.726 |
| 2023 | 23.747 |
| 2024 | 23.753 |
| 2025 | 23.698 |
| 2026 | 23.766 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 12.114 | 51.0% |
| Women | 11.652 | 49.0% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 182 |
| 2022 | 164 |
| 2023 | 144 |
| 2024 | 140 |
| 2025 | 160 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 18.393 |
| 1961 | 17.846 |
| 1971 | 17.846 |
| 1981 | 19.896 |
| 1991 | 21.457 |
| 2001 | 21.935 |
| 2011 | 24.114 |
| 2019 | 23.613 |
| 2020 | 23.548 |
| 2021 | 23.576 |
| 2022 | 23.726 |
| 2023 | 23.747 |
| 2024 | 23.753 |
| 2025 | 23.698 |
| 2026 | 23.766 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 20.748 | 43.8% |
| Married | 21.504 | 45.4% |
| Divorced | 1504 | 3.2% |
| Widowed | 3626 | 7.7% |
School-Age Population (2026)
Total 0-18 years: 3803
| Valore | |
|---|---|
| Nido (0-2) | 451 |
| Infanzia (3-5) | 499 |
| Primaria (6-10) | 1013 |
| Medie (11-13) | 645 |
| Superiori (14-18) | 1195 |
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>