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Population & demographics
All demographic data for San Marzano sul Sarno: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Marzano sul Sarno.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Marzano sul Sarno.
San Marzano sul Sarno is a medium-sized municipality in the province of Salerno, Campania region. With a population of 10.209 inhabitants and a density of 1967 per km², it covers an area of 5,2 km². The average declared income is 15.304 €.
San Marzano sul Sarno in numbers: the analysis
San Marzano sul Sarno has grown substantially since 1951: from 7,066 inhabitants then to 10,209 in 2026, an increase of 44.5%.
The generational balance is in line with the norm: the ageing index of San Marzano sul Sarno is 124 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 9,196 inhabitants for San Marzano sul Sarno: an expected decline of 9.9% from today.
The average municipality in the province of Salerno has about 6,666 residents: San Marzano sul Sarno has 1.5 times as many.
Among the 158 municipalities of the province of Salerno, San Marzano sul Sarno ranks 26 by population.
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: 1959
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Marzano sul Sarno population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-marzano-sul-sarno-065122" title="Population pyramid of San Marzano sul Sarno — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-marzano-sul-sarno-065122" alt="Population pyramid of San Marzano sul Sarno — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>