San Costanzo: 4648 inhabitants (2026)
ISTAT Code: 041051
43.7631°N, 13.0695°E
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Population & demographics
All demographic data for San Costanzo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for San Costanzo.
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Air quality (PM2.5, PM10, NO2) and land consumption data for San Costanzo.
San Costanzo is a small municipality in the province of Pesaro e Urbino, Marche region. With a population of 4648 inhabitants and a density of 113 per km², it covers an area of 41.0 km². The average declared income is 21.703 €.
San Costanzo in numbers: the analysis
The generational balance is in line with the norm: the ageing index of San Costanzo is 208 (over-65s per 100 under-14s).
For 2050 the projections point to an essentially unchanged population: about 4,517 inhabitants.
Compared with the provincial average of Pesaro e Urbino (about 6,991 residents per municipality), San Costanzo is a markedly smaller centre.
Among the 50 municipalities of the province of Pesaro e Urbino, San Costanzo ranks 19 by population.
The census record tells a story of long decline: in 1951 San Costanzo had 5,251 inhabitants; today (2026) it has 4,648 — 11.5% fewer.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 4687 |
| 2020 | 4593 |
| 2021 | 4583 |
| 2022 | 4554 |
| 2023 | 4557 |
| 2024 | 4573 |
| 2025 | 4583 |
| 2026 | 4648 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 2367 | 50.9% |
| Women | 2281 | 49.1% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 27 |
| 2022 | 37 |
| 2023 | 36 |
| 2024 | 32 |
| 2025 | 33 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 5251 |
| 1961 | 4526 |
| 1971 | 3977 |
| 1981 | 3916 |
| 1991 | 3980 |
| 2001 | 4120 |
| 2011 | 4841 |
| 2019 | 4687 |
| 2020 | 4593 |
| 2021 | 4583 |
| 2022 | 4554 |
| 2023 | 4557 |
| 2024 | 4573 |
| 2025 | 4583 |
| 2026 | 4648 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 4078 | 44.5% |
| Married | 4092 | 44.6% |
| Divorced | 334 | 3.6% |
| Widowed | 662 | 7.2% |
School-Age Population (2026)
Total 0-18 years: 748
| Valore | |
|---|---|
| Nido (0-2) | 106 |
| Infanzia (3-5) | 107 |
| Primaria (6-10) | 174 |
| Medie (11-13) | 126 |
| Superiori (14-18) | 235 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the San Costanzo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/san-costanzo-041051" title="Population pyramid of San Costanzo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/san-costanzo-041051" alt="Population pyramid of San Costanzo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>