Terzo: 817 inhabitants (2026)
ISTAT Code: 006172
44.6695°N, 8.4211°E
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Population & demographics
All demographic data for Terzo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Terzo.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Terzo.
Terzo is a small municipality in the province of Alessandria, Piemonte region. With a population of 817 inhabitants and a density of 94 per km², it covers an area of 8.7 km². The average declared income is 23.277 €.
Terzo in numbers: the analysis
Among the 187 municipalities of the province of Alessandria, Terzo ranks 85 by population.
The census record tells a story of long decline: in 1951 Terzo had 1,175 inhabitants; today (2026) it has 817 — 30.5% fewer.
The ageing index is one of the starkest signals: in Terzo there are 372 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 722 inhabitants for Terzo: an expected decline of 11.6% from today.
Compared with the provincial average of Alessandria (about 2,182 residents per municipality), Terzo is a markedly smaller centre.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 847 |
| 2020 | 853 |
| 2021 | 846 |
| 2022 | 838 |
| 2023 | 821 |
| 2024 | 821 |
| 2025 | 825 |
| 2026 | 817 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 406 | 49.7% |
| Women | 411 | 50.3% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 5 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1175 |
| 1961 | 1001 |
| 1971 | 834 |
| 1981 | 803 |
| 1991 | 858 |
| 2001 | 846 |
| 2011 | 907 |
| 2019 | 847 |
| 2020 | 853 |
| 2021 | 846 |
| 2022 | 838 |
| 2023 | 821 |
| 2024 | 821 |
| 2025 | 825 |
| 2026 | 817 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 638 | 38.7% |
| Married | 796 | 48.2% |
| Divorced | 88 | 5.3% |
| Widowed | 128 | 7.8% |
School-Age Population (2026)
Total 0-18 years: 96
| Valore | |
|---|---|
| Nido (0-2) | 13 |
| Infanzia (3-5) | 10 |
| Primaria (6-10) | 24 |
| Medie (11-13) | 16 |
| Superiori (14-18) | 33 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Terzo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/terzo-006172" title="Population pyramid of Terzo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/terzo-006172" alt="Population pyramid of Terzo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>