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Population & demographics
All demographic data for Caiolo: population, births, deaths, balances and historical trends.
Income & tax data
Average income, median income, income brackets and historical trends for Caiolo.
Environment & air quality
Air quality (PM2.5, PM10, NO2) and land consumption data for Caiolo.
Caiolo is a small municipality in the province of Sondrio, Lombardia region. With a population of 1034 inhabitants and a density of 31 per km², it covers an area of 33 km². The average declared income is 25.147 €.
Caiolo in numbers: the analysis
Among the 77 municipalities of the province of Sondrio, Caiolo ranks 46 by population.
Compared with the provincial average of Sondrio (about 2,328 residents per municipality), Caiolo is a markedly smaller centre.
Demographic projections to 2050 estimate about 871 inhabitants for Caiolo: an expected decline of 15.8% from today.
The generational balance is in line with the norm: the ageing index of Caiolo is 246 (over-65s per 100 under-14s).
The census record tells a story of long decline: in 1951 Caiolo had 1,101 inhabitants; today (2026) it has 1,034 — 6.1% fewer.
Population Trend
Male/Female Ratio
Demographic Statistics
Demographic Indices
Births (recent years)
Historical Population (1951-present)
Marital Status (2025)
School-Age Population (2026)
Total 0-18 years: 148
Foreign residents
Foreign presence and top citizenships
Embed this chart
Use the Caiolo population pyramid on your site or article — the DatiItalia source link is already included.
<a href="https://datitalia.eu/comune/caiolo-014011" title="Population pyramid of Caiolo — DatiItalia"><img src="https://datitalia.eu/render/chart/piramide/caiolo-014011" alt="Population pyramid of Caiolo — DatiItalia" width="600" style="max-width:100%;height:auto;border:0" loading="lazy" /></a>