San Pier d'Isonzo: 1914 inhabitants (2026)
ISTAT Code: 031021
45.8459°N, 13.4607°E
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Population & demographics
All demographic data for San Pier d'Isonzo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Pier d'Isonzo.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Pier d'Isonzo.
San Pier d'Isonzo is a small municipality in the province of Gorizia, Friuli-Venezia Giulia region. With a population of 1914 inhabitants and a density of 220 per km², it covers an area of 8.7 km². The average declared income is 24.381 €.
San Pier d'Isonzo in numbers: the analysis
Over the long run the population of San Pier d'Isonzo has stayed essentially stable: 1,888 inhabitants in 1951, 1,914 in 2026 (less than 5% change).
Among the 25 municipalities of the province of Gorizia, San Pier d'Isonzo ranks 13 by population.
Compared with the provincial average of Gorizia (about 5,549 residents per municipality), San Pier d'Isonzo is a markedly smaller centre.
Demographic projections to 2050 estimate about 1,610 inhabitants for San Pier d'Isonzo: an expected decline of 15.9% from today.
The ageing index is one of the starkest signals: in San Pier d'Isonzo there are 293 residents over 65 for every 100 under 14, well above the national average.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 2013 |
| 2020 | 1998 |
| 2021 | 1977 |
| 2022 | 1993 |
| 2023 | 1973 |
| 2024 | 1940 |
| 2025 | 1919 |
| 2026 | 1914 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 985 | 51.5% |
| Women | 929 | 48.5% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 6 |
| 2025 | 4 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 1888 |
| 1961 | 1803 |
| 1971 | 1667 |
| 1981 | 1716 |
| 1991 | 1822 |
| 2001 | 1892 |
| 2011 | 2019 |
| 2019 | 2013 |
| 2020 | 1998 |
| 2021 | 1977 |
| 2022 | 1993 |
| 2023 | 1973 |
| 2024 | 1940 |
| 2025 | 1919 |
| 2026 | 1914 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1560 | 40.6% |
| Married | 1788 | 46.6% |
| Divorced | 188 | 4.9% |
| Widowed | 302 | 7.9% |
School-Age Population (2026)
Total 0-18 years: 267
| Valore | |
|---|---|
| Nido (0-2) | 17 |
| Infanzia (3-5) | 28 |
| Primaria (6-10) | 67 |
| Medie (11-13) | 58 |
| Superiori (14-18) | 97 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Pier d'Isonzo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-pier-d-isonzo-031021" title="Population pyramid of San Pier d'Isonzo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-pier-d-isonzo-031021" alt="Population pyramid of San Pier d'Isonzo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>Municipalities with similar population
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