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Population & demographics
All demographic data for San Marzano Oliveto: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Marzano Oliveto.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Marzano Oliveto.
San Marzano Oliveto is a small municipality in the province of Asti, Piemonte region. With a population of 930 inhabitants and a density of 96 per km², it covers an area of 9.7 km². The average declared income is 23.083 €.
San Marzano Oliveto in numbers: the analysis
Compared with the provincial average of Asti (about 1,770 residents per municipality), San Marzano Oliveto is a markedly smaller centre.
Demographic projections to 2050 estimate about 687 inhabitants for San Marzano Oliveto: an expected decline of 26.1% from today.
The ageing index is one of the starkest signals: in San Marzano Oliveto there are 312 residents over 65 for every 100 under 14, well above the national average.
The census record tells a story of long decline: in 1951 San Marzano Oliveto had 1,384 inhabitants; today (2026) it has 930 — 32.8% fewer.
Among the 117 municipalities of the province of Asti, San Marzano Oliveto ranks 42 by population.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 1016 |
| 2020 | 1015 |
| 2021 | 992 |
| 2022 | 989 |
| 2023 | 1000 |
| 2024 | 994 |
| 2025 | 960 |
| 2026 | 930 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 476 | 51.2% |
| Women | 454 | 48.8% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 1 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1384 |
| 1961 | 1166 |
| 1971 | 1064 |
| 1981 | 970 |
| 1991 | 934 |
| 2001 | 1012 |
| 2011 | 1067 |
| 2019 | 1016 |
| 2020 | 1015 |
| 2021 | 992 |
| 2022 | 989 |
| 2023 | 1000 |
| 2024 | 994 |
| 2025 | 960 |
| 2026 | 930 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 730 | 38.0% |
| Married | 958 | 49.9% |
| Divorced | 72 | 3.8% |
| Widowed | 160 | 8.3% |
School-Age Population (2026)
Total 0-18 years: 124
| Valore | |
|---|---|
| Nido (0-2) | 10 |
| Infanzia (3-5) | 23 |
| Primaria (6-10) | 20 |
| Medie (11-13) | 21 |
| Superiori (14-18) | 50 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Marzano Oliveto population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-marzano-oliveto-005100" title="Population pyramid of San Marzano Oliveto — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-marzano-oliveto-005100" alt="Population pyramid of San Marzano Oliveto — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>