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Population & demographics
All demographic data for Castel Gandolfo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Castel Gandolfo.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Castel Gandolfo.
Castel Gandolfo is a medium-sized municipality in the province of Roma, Lazio region. With a population of 8536 inhabitants and a density of 614 per km², it covers an area of 13.9 km². The average declared income is 24.855 €.
Castel Gandolfo in numbers: the analysis
Among the 121 municipalities of the province of Roma, Castel Gandolfo ranks 49 by population.
Castel Gandolfo has grown substantially since 1951: from 4,172 inhabitants then to 8,536 in 2026, an increase of 104.6%.
The generational balance is in line with the norm: the ageing index of Castel Gandolfo is 219 (over-65s per 100 under-14s).
Demographic projections to 2050 estimate about 7,765 inhabitants for Castel Gandolfo: an expected decline of 9% from today.
Compared with the provincial average of Roma (about 34,917 residents per municipality), Castel Gandolfo is a markedly smaller centre.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 8775 |
| 2020 | 8722 |
| 2021 | 8585 |
| 2022 | 8652 |
| 2023 | 8553 |
| 2024 | 8615 |
| 2025 | 8543 |
| 2026 | 8536 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 4023 | 47.1% |
| Women | 4513 | 52.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 64 |
| 2022 | 47 |
| 2023 | 38 |
| 2024 | 38 |
| 2025 | 46 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 4172 |
| 1961 | 4395 |
| 1971 | 4709 |
| 1981 | 6246 |
| 1991 | 6843 |
| 2001 | 7930 |
| 2011 | 8782 |
| 2019 | 8775 |
| 2020 | 8722 |
| 2021 | 8585 |
| 2022 | 8652 |
| 2023 | 8553 |
| 2024 | 8615 |
| 2025 | 8543 |
| 2026 | 8536 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 7844 | 45.9% |
| Married | 7526 | 44.0% |
| Divorced | 672 | 3.9% |
| Widowed | 1044 | 6.1% |
School-Age Population (2026)
Total 0-18 years: 1268
| Valore | |
|---|---|
| Nido (0-2) | 134 |
| Infanzia (3-5) | 171 |
| Primaria (6-10) | 310 |
| Medie (11-13) | 219 |
| Superiori (14-18) | 434 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Castel Gandolfo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/castel-gandolfo-058022" title="Population pyramid of Castel Gandolfo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/castel-gandolfo-058022" alt="Population pyramid of Castel Gandolfo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>