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Population & demographics
All demographic data for Castel San Niccolò: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castel San Niccolò.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castel San Niccolò.
Castel San Niccolò is a small municipality in the province of Arezzo, Toscana region. With a population of 2493 inhabitants and a density of 30 per km², it covers an area of 83.2 km². The average declared income is 21.271 €.
Castel San Niccolò in numbers: the analysis
Demographic projections to 2050 estimate about 2,040 inhabitants for Castel San Niccolò: an expected decline of 18.2% from today.
The ageing index is one of the starkest signals: in Castel San Niccolò there are 340 residents over 65 for every 100 under 14, well above the national average.
The census record tells a story of long decline: in 1951 Castel San Niccolò had 6,477 inhabitants; today (2026) it has 2,493 — 61.5% fewer.
Among the 36 municipalities of the province of Arezzo, Castel San Niccolò ranks 26 by population.
Compared with the provincial average of Arezzo (about 9,257 residents per municipality), Castel San Niccolò is a markedly smaller centre.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 2643 |
| 2020 | 2612 |
| 2021 | 2544 |
| 2022 | 2517 |
| 2023 | 2492 |
| 2024 | 2454 |
| 2025 | 2476 |
| 2026 | 2493 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 1236 | 49.6% |
| Women | 1257 | 50.4% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 7 |
| 2022 | 11 |
| 2023 | 11 |
| 2024 | 16 |
| 2025 | 14 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 6477 |
| 1961 | 4494 |
| 1971 | 3344 |
| 1981 | 3043 |
| 1991 | 2859 |
| 2001 | 2855 |
| 2011 | 2739 |
| 2019 | 2643 |
| 2020 | 2612 |
| 2021 | 2544 |
| 2022 | 2517 |
| 2023 | 2492 |
| 2024 | 2454 |
| 2025 | 2476 |
| 2026 | 2493 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 1972 | 39.8% |
| Married | 2262 | 45.7% |
| Divorced | 220 | 4.4% |
| Widowed | 498 | 10.1% |
School-Age Population (2026)
Total 0-18 years: 303
| Valore | |
|---|---|
| Nido (0-2) | 43 |
| Infanzia (3-5) | 36 |
| Primaria (6-10) | 77 |
| Medie (11-13) | 54 |
| Superiori (14-18) | 93 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castel San Niccolò population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castel-san-niccolo-051010" title="Population pyramid of Castel San Niccolò — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castel-san-niccolo-051010" alt="Population pyramid of Castel San Niccolò — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>