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Population & demographics
All demographic data for San Leucio del Sannio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Leucio del Sannio.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Leucio del Sannio.
San Leucio del Sannio is a small municipality in the province of Benevento, Campania region. With a population of 2877 inhabitants and a density of 286 per km², it covers an area of 10.1 km². The average declared income is 18.111 €.
San Leucio del Sannio in numbers: the analysis
Demographic projections to 2050 estimate about 2,344 inhabitants for San Leucio del Sannio: an expected decline of 18.5% from today.
Among the 78 municipalities of the province of Benevento, San Leucio del Sannio ranks 25 by population.
The census record tells a story of long decline: in 1951 San Leucio del Sannio had 4,062 inhabitants; today (2026) it has 2,877 — 29.2% fewer.
The generational balance is in line with the norm: the ageing index of San Leucio del Sannio is 239 (over-65s per 100 under-14s).
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 3054 |
| 2020 | 3013 |
| 2021 | 2920 |
| 2022 | 2949 |
| 2023 | 2946 |
| 2024 | 2897 |
| 2025 | 2888 |
| 2026 | 2877 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1429 | 49.7% |
| Women | 1448 | 50.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 20 |
| 2022 | 25 |
| 2023 | 26 |
| 2024 | 20 |
| 2025 | 18 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 4062 |
| 1961 | 3526 |
| 1971 | 3112 |
| 1981 | 3179 |
| 1991 | 3307 |
| 2001 | 3159 |
| 2011 | 3238 |
| 2019 | 3054 |
| 2020 | 3013 |
| 2021 | 2920 |
| 2022 | 2949 |
| 2023 | 2946 |
| 2024 | 2897 |
| 2025 | 2888 |
| 2026 | 2877 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 2324 | 40.2% |
| Married | 2832 | 49.0% |
| Divorced | 132 | 2.3% |
| Widowed | 488 | 8.4% |
School-Age Population (2026)
Total 0-18 years: 421
| Valore | |
|---|---|
| Nido (0-2) | 60 |
| Infanzia (3-5) | 64 |
| Primaria (6-10) | 100 |
| Medie (11-13) | 54 |
| Superiori (14-18) | 143 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Leucio del Sannio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-leucio-del-sannio-062060" title="Population pyramid of San Leucio del Sannio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-leucio-del-sannio-062060" alt="Population pyramid of San Leucio del Sannio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>