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Population & demographics
All demographic data for Casteggio: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Casteggio.
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Air quality (PM2.5, PM10, NO2) and land consumption data for Casteggio.
Casteggio is a medium-sized municipality in the province of Pavia, Lombardia region. With a population of 6363 inhabitants and a density of 367 per km², it covers an area of 17.4 km². The average declared income is 25.120 €.
Casteggio in numbers: the analysis
Over the long run the population of Casteggio has stayed essentially stable: 6,095 inhabitants in 1951, 6,363 in 2026 (less than 5% change).
The ageing index is one of the starkest signals: in Casteggio there are 306 residents over 65 for every 100 under 14, well above the national average.
Demographic projections to 2050 estimate about 5,337 inhabitants for Casteggio: an expected decline of 16.1% from today.
The average municipality in the province of Pavia has about 2,951 residents: Casteggio has 2.2 times as many.
By population, Casteggio ranks no. 17 among the 185 municipalities of the province of Pavia.
Population Trend
| Anno | Popolazione |
|---|---|
| 2019 | 6698 |
| 2020 | 6665 |
| 2021 | 6552 |
| 2022 | 6490 |
| 2023 | 6444 |
| 2024 | 6461 |
| 2025 | 6435 |
| 2026 | 6363 |
Male/Female Ratio
| Valore | % | |
|---|---|---|
| Men | 3061 | 48.1% |
| Women | 3302 | 51.9% |
Demographic Statistics
Demographic Indices
Births (recent years)
| Valore | |
|---|---|
| 2021 | 29 |
| 2022 | 36 |
| 2023 | 30 |
| 2024 | 33 |
| 2025 | 29 |
Historical Population (1951-present)
| Anno | Population |
|---|---|
| 1951 | 6095 |
| 1961 | 7030 |
| 1971 | 7813 |
| 1981 | 7417 |
| 1991 | 7276 |
| 2001 | 6337 |
| 2011 | 6836 |
| 2019 | 6698 |
| 2020 | 6665 |
| 2021 | 6552 |
| 2022 | 6490 |
| 2023 | 6444 |
| 2024 | 6461 |
| 2025 | 6435 |
| 2026 | 6363 |
Marital Status (2025)
| Valore | % | |
|---|---|---|
| Single | 5206 | 40.5% |
| Married | 5728 | 44.5% |
| Divorced | 712 | 5.5% |
| Widowed | 1224 | 9.5% |
School-Age Population (2026)
Total 0-18 years: 822
| Valore | |
|---|---|
| Nido (0-2) | 90 |
| Infanzia (3-5) | 116 |
| Primaria (6-10) | 218 |
| Medie (11-13) | 147 |
| Superiori (14-18) | 251 |
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Casteggio population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/casteggio-018037" title="Population pyramid of Casteggio — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/casteggio-018037" alt="Population pyramid of Casteggio — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>